Your housing ratio shows how much of your gross monthly income would be used by the proposed home payment.
Suppose you earn $8,000 per month before taxes and the complete housing payment is $2,240. Your housing ratio is 28%.
$2,240 ÷ $8,000 × 100 = 28%
The ratio gives you a quick way to judge whether a home may be within reach. It does not tell you whether the payment will feel comfortable after taxes, childcare, groceries, repairs, retirement savings, and everything else competing for your paycheck.
You may hear that housing should stay near 28% of gross income. That is a useful planning guideline, not a universal approval limit. A lender may approve more or less depending on the mortgage, your other debts, your credit, your cash reserves, and the rest of the application.
The lender uses the ratio to evaluate risk.
You should use it to start a budget.
What is a housing ratio?
The housing ratio is the percentage of your gross monthly income that would go toward the qualifying monthly housing expense.
It is also commonly described as the housing expense-to-income ratio or front-end ratio.
Freddie Mac distinguishes the housing expense ratio from the broader debt-to-income ratio. The housing ratio looks at the proposed mortgage-related payment, while total DTI includes the mortgage and other debts.
The basic formula is:
Monthly housing expense ÷ gross monthly income × 100 = housing ratio
A simple example
Suppose:
- Gross monthly income: $7,500
- Complete monthly housing expense: $2,100
Housing ratio:
$2,100 ÷ $7,500 × 100 = 28%
That means 28 cents of every dollar earned before taxes and payroll deductions would be committed to the qualifying housing expense.
It does not mean 72% of your paycheck will remain available.
Taxes, health insurance, retirement deductions, and other payroll deductions have not left the income number yet.
Gross income means before taxes
The denominator in the housing ratio is gross monthly income, not take-home pay.
Gross income is generally the income earned before taxes and other deductions are removed. The CFPB uses the same gross-income approach when explaining the broader debt-to-income calculation.
Converting annual salary to monthly income
Suppose your annual gross salary is $96,000.
Gross monthly income:
$96,000 ÷ 12 = $8,000
If two borrowers earn $60,000 and $48,000:
Combined annual gross income:
$60,000 + $48,000 = $108,000
Combined monthly gross income:
$108,000 ÷ 12 = $9,000
The lender decides which income can be used for qualification and how it must be documented. Do not automatically include a bonus, new side income, or occasional overtime merely because it appeared in your bank account once.
Why gross income can make a payment look easier
Suppose your gross monthly income is $8,000, but your take-home pay is $6,200.
A $2,240 housing payment produces a 28% lender-style housing ratio:
$2,240 ÷ $8,000 × 100 = 28%
As a percentage of take-home pay:
$2,240 ÷ $6,200 × 100 = approximately 36.1%
The ratio did not change incorrectly.
It answered a different question.
The lender asks how the payment compares with qualifying gross income. Your household needs to ask how much spendable cash remains after the payment leaves checking.
What belongs in the monthly housing expense?
A first-time buyer may calculate the ratio using only principal and interest.
That can produce a dangerously optimistic number.
For many conventional mortgage calculations, the qualifying monthly housing expense is referred to as PITIA. Fannie Mae lists principal and interest, property and flood insurance when applicable, mortgage insurance, real estate taxes, ground rent, special assessments, and owners’ association dues among the possible components.
Your calculation may include:
- Mortgage principal
- Mortgage interest
- Property taxes
- Homeowners insurance
- Flood or other required property insurance
- Mortgage insurance
- Homeowners association or condominium dues
- Ground rent
- Special assessments
- Qualifying payments on certain subordinate financing
The exact qualifying calculation depends on the loan and property.
Principal and interest
Principal is the amount of the mortgage balance being repaid.
Interest is the lender’s charge for providing the money.
These two amounts form the core scheduled payment on a typical fixed-rate mortgage.
Property taxes
Property taxes may be paid through an escrow account or directly by the homeowner.
Either way, they belong in the housing cost.
Suppose annual property taxes are estimated at $4,800.
Monthly amount:
$4,800 ÷ 12 = $400
A mortgage calculator showing $1,900 of principal and interest has not shown you a $1,900 home payment when another $400 must be reserved for taxes.
Homeowners insurance
Homeowners insurance is another cost that may be collected through escrow or paid separately.
Suppose the annual premium is $1,800.
Monthly amount:
$1,800 ÷ 12 = $150
Mortgage insurance
Mortgage insurance may apply when the down payment is below 20%, depending on the mortgage program. It increases the monthly cost and may require you to reduce the home price you can afford.
Suppose private mortgage insurance adds $140 per month.
That $140 belongs in the housing ratio even though it does not reduce your principal balance.
Association dues
Condominium or homeowners association dues are often paid directly to the association rather than to the mortgage servicer.
They still affect your housing expense and household cash flow. Fannie Mae includes applicable association dues in the qualifying monthly housing expense.
A $350 monthly condominium fee is not a side note.
It can reduce the mortgage payment your income can support by $350.
A complete housing ratio example
Suppose you are considering a home with these estimated monthly costs:
| Housing cost | Monthly amount |
|---|---|
| Principal and interest | $1,650 |
| Property taxes | $350 |
| Homeowners insurance | $125 |
| Mortgage insurance | $75 |
| Association dues | $40 |
Total monthly housing expense:
$1,650 + $350 + $125 + $75 + $40 = $2,240
Your annual gross income is $96,000.
Monthly gross income:
$96,000 ÷ 12 = $8,000
Housing ratio:
$2,240 ÷ $8,000 × 100 = 28%
If you forgot the taxes, insurance, mortgage insurance, and association dues, you might calculate:
$1,650 ÷ $8,000 × 100 = 20.63%
That would make the home look much easier to afford than it really is.
The missing $590 still has to be paid every month.
What is the 28% housing rule?
The 28% rule suggests keeping the qualifying housing expense at or below 28% of gross monthly income.
It is usually paired with a 36% guideline for total monthly debt. Fannie Mae describes the 28/36 rule as a guideline suggesting a maximum 28% housing expense ratio and 36% total debt-to-income ratio.
Maximum housing expense using 28%
Suppose your gross monthly income is $8,000.
Guideline housing amount:
$8,000 × 28% = $2,240
At $10,000 of gross monthly income:
$10,000 × 28% = $2,800
At $6,000:
$6,000 × 28% = $1,680
| Gross monthly income | Housing amount at 25% | Housing amount at 28% | Housing amount at 30% |
|---|---|---|---|
| $5,000 | $1,250 | $1,400 | $1,500 |
| $6,000 | $1,500 | $1,680 | $1,800 |
| $8,000 | $2,000 | $2,240 | $2,400 |
| $10,000 | $2,500 | $2,800 | $3,000 |
| $12,000 | $3,000 | $3,360 | $3,600 |
This table gives you a planning range.
It does not give you a loan approval.
Is 28% a hard mortgage limit?
No.
There is no single housing-ratio cutoff that applies to every lender, loan program, borrower, and property.
Freddie Mac’s consumer guidance generally suggests keeping housing near 25% to 30% of gross income. Fannie Mae presents 28% as part of a planning guideline. Actual underwriting can consider the complete risk profile rather than one ratio alone.
A lender may be more comfortable with a higher housing ratio when the borrower has:
- Strong credit
- Substantial savings after closing
- A larger down payment
- Stable documented income
- Few other monthly debts
- A history of paying a similar housing amount
A lower ratio may still result in problems when the borrower has unstable income, recent missed payments, limited cash, or other risks.
The current ability-to-repay rules require creditors to consider factors such as income or assets, debts, and a monthly DTI ratio or residual income, but the rules do not impose one universal DTI threshold for every covered mortgage. The creditor must make a reasonable, good-faith determination under the applicable requirements.
That is why two lenders can review the same buyer and produce different answers.
Housing ratio vs debt-to-income ratio
The housing ratio measures the proposed housing expense against gross income.
The debt-to-income ratio, sometimes called the back-end ratio, includes the housing expense plus other monthly debts.
Housing ratio formula
Monthly housing expense ÷ gross monthly income × 100
Total DTI formula
Housing expense + other monthly debt payments ÷ gross monthly income × 100
The CFPB defines DTI as total monthly debt payments divided by gross monthly income.
A side-by-side example
Suppose:
- Gross monthly income: $9,000
- Complete housing expense: $2,661.20
- Car loan: $450
- Student loan: $250
- Credit card minimums: $100
Housing ratio:
$2,661.20 ÷ $9,000 × 100 = approximately 29.57%
Total monthly debt:
$2,661.20 + $450 + $250 + $100 = $3,461.20
Total DTI:
$3,461.20 ÷ $9,000 × 100 = approximately 38.46%
| Ratio | What it includes | Result |
|---|---|---|
| Housing ratio | Proposed housing expense | 29.57% |
| Total DTI | Housing plus car, student loan, and cards | 38.46% |
The housing ratio shows that the home alone takes almost 30% of gross income.
The total DTI shows that existing debts push the committed share closer to 39%.
A buyer can have a reasonable housing ratio and still struggle with total debt.
What debts affect the total DTI?
Depending on the applicable underwriting rules, recurring obligations may include items such as:
- Auto loans
- Student loans
- Credit card minimum payments
- Personal loans
- Other mortgages
- Alimony or child support obligations
- Installment debts
- Payments on certain deferred or contingent debts
The lender may calculate a payment even when a credit report shows a balance but no clear required payment. Current Fannie Mae guidance, for example, contains specific methods for handling certain revolving accounts and other liabilities.
Do not estimate your total DTI using only the debts you remember paying last week.
Review your credit reports and monthly statements.
What the housing ratio leaves out
The qualifying housing expense can be much broader than principal and interest.
It still does not capture every cost of living in the home.
Items commonly outside the basic housing ratio include:
- Electricity
- Gas
- Water and sewer charges paid individually
- Internet and phone service
- Routine maintenance
- Home repairs
- Lawn care
- Pest control
- Furniture
- Appliance replacement
- Travel time and commuting costs
Fannie Mae’s qualifying housing-expense guidance excludes utility charges that apply to an individual unit, even though certain common-area utility charges may be part of association dues.
This is where a borrower can pass the ratio and still dislike the mortgage.
A homeownership budget example
Suppose the qualifying housing expense is $2,240.
You also expect:
- Utilities: $350
- Maintenance and repair fund: $300
- Lawn and pest care: $100
Complete monthly ownership budget:
$2,240 + $350 + $300 + $100 = $2,990
The lender-style housing ratio on $8,000 of gross income remains:
$2,240 ÷ $8,000 × 100 = 28%
Your broader homeownership-cost ratio is:
$2,990 ÷ $8,000 × 100 = 37.38%
The lender did not make a calculation error.
The standard ratio was never designed to replace your household budget.
Use take-home pay for your personal test
After calculating the official-style housing ratio, calculate a second ratio using take-home pay.
This personal ratio is not normally the lender’s underwriting number.
It is still useful.
Formula:
Complete monthly homeownership cost ÷ take-home income × 100
Example
Suppose:
- Take-home income: $6,200
- Mortgage-related housing expense: $2,240
- Utilities and maintenance reserve: $750
Complete cost:
$2,240 + $750 = $2,990
Share of take-home pay:
$2,990 ÷ $6,200 × 100 = approximately 48.23%
Almost half of the spendable income would be going to the home.
That may work for a household with no dependents, low transportation costs, and substantial savings.
It may be unbearable for a household paying $1,500 for childcare and $700 for transportation.
The housing ratio can change with the property
Your income may stay the same while the ratio changes from one house to another.
The home price is only one reason.
Property taxes differ
Two homes priced at $350,000 may have very different property-tax bills.
A difference of $2,400 per year changes the monthly housing expense by:
$2,400 ÷ 12 = $200
On $8,000 of gross monthly income, that $200 changes the housing ratio by:
$200 ÷ $8,000 × 100 = 2.5 percentage points
Insurance differs
Insurance can vary with the property, coverage, location, construction, deductible, and other underwriting factors.
Flood or other supplementary insurance may also be required.
Get an estimate for the actual home before treating the ratio as final.
Association fees differ
One condominium may charge $150 per month.
Another may charge $650.
The difference is:
$650 − $150 = $500 per month
At $8,000 of gross income, the higher fee adds:
$500 ÷ $8,000 × 100 = 6.25 percentage points
A lower-priced condominium can have the higher housing ratio.
Mortgage insurance differs
A smaller down payment may increase the loan amount and add mortgage insurance.
The CFPB advises buyers to include mortgage insurance when setting their target home price rather than adding it after choosing the property.
Interest rates change how much loan the ratio supports
A housing ratio gives you a maximum monthly expense, not a fixed home price.
The mortgage amount supported by that payment changes with the interest rate.
A hypothetical example
Suppose:
- Gross monthly income: $10,000
- Target housing ratio: 28%
Maximum housing expense under the guideline:
$10,000 × 28% = $2,800
Estimated non-principal-and-interest costs:
- Property taxes: $550
- Insurance: $150
- Mortgage insurance: $125
- Association dues: $75
Total other housing costs:
$550 + $150 + $125 + $75 = $900
Amount left for principal and interest:
$2,800 − $900 = $1,900
On a hypothetical 30-year fixed-rate loan, approximately:
| Hypothetical interest rate | Loan supported by a $1,900 principal and interest payment |
|---|---|
| 5.5% | $334,631 |
| 6.5% | $300,601 |
| 7.5% | $271,733 |
The same income and the same 28% ratio support very different loan amounts.
A rate increase from 5.5% to 7.5% reduces the approximate mortgage amount by:
$334,631 − $271,733 = $62,898
That is why you should not choose a home price using an old online example.
Use a current lender estimate and rerun the full housing ratio.
A fixed-rate mortgage can still have a changing housing cost
A fixed-rate mortgage generally keeps the scheduled principal and interest calculation stable.
Your complete monthly payment may still change because property taxes, homeowners insurance, mortgage insurance, or escrow requirements change. The CFPB’s Loan Estimate guidance warns that total monthly payment is usually higher than principal and interest because taxes and insurance must also be included.
Stress-test the estimate
Suppose your proposed housing payment is $2,240.
Test it with:
- $50 more for insurance
- $100 more for property taxes
- $50 more for association dues
Stress-tested payment:
$2,240 + $50 + $100 + $50 = $2,440
Housing ratio on $8,000 of gross income:
$2,440 ÷ $8,000 × 100 = 30.5%
If the additional $200 makes the budget collapse, the original payment was already too close to the edge.
How a down payment affects the housing ratio
A larger down payment can reduce the loan amount and principal-and-interest payment.
It may also reduce or remove mortgage insurance, depending on the loan.
Example on a $400,000 home
Suppose the hypothetical rate is 6.5% for 30 years.
| Down payment | Mortgage amount | Estimated principal and interest |
|---|---|---|
| 5%, or $20,000 | $380,000 | $2,401.86 |
| 10%, or $40,000 | $360,000 | $2,275.44 |
| 20%, or $80,000 | $320,000 | $2,022.62 |
The difference between 5% and 20% down is:
$2,401.86 − $2,022.62 = $379.24 per month
The 5% option may also include mortgage insurance.
But using every dollar to reach 20% can create another problem. The housing ratio may improve while your emergency fund disappears.
A lower ratio is not worth much when the first plumbing repair goes onto a credit card.
How other debts can limit a reasonable housing ratio
Suppose two buyers earn the same $8,000 gross monthly income.
Both are considering a $2,240 housing payment.
Both have a 28% housing ratio.
Buyer A
- Housing payment: $2,240
- Other debt payments: $200
Total DTI:
($2,240 + $200) ÷ $8,000 × 100 = 30.5%
Buyer B
- Housing payment: $2,240
- Auto loans: $850
- Student loans: $500
- Credit cards: $250
Total monthly debt:
$2,240 + $850 + $500 + $250 = $3,840
Total DTI:
$3,840 ÷ $8,000 × 100 = 48%
The homes are equally expensive.
The buyers are not equally positioned to carry them.
Should you pay off debt to lower your ratio?
Paying off a monthly debt can improve total DTI and free household cash.
But do not automatically use all down-payment or emergency savings to eliminate every loan.
Compare the monthly benefit
Suppose you owe $4,000 on a car loan with a $400 monthly payment.
Paying it off removes $400 from total monthly debt.
On $8,000 of gross income, that lowers total DTI by:
$400 ÷ $8,000 × 100 = 5 percentage points
That can make a meaningful difference.
Now suppose a credit card has a $500 balance and a $30 minimum.
Paying it off lowers monthly DTI by:
$30 ÷ $8,000 × 100 = 0.375 percentage points
Both debts may be worth paying.
They do not affect the ratio equally.
Ask the lender how paying off a particular obligation would affect qualification before moving large amounts of cash.
Variable income needs a cautious approach
Commission, overtime, bonuses, tips, self-employment income, or seasonal work may not be treated like a fixed salary.
The lender may need to document that the income is stable and likely to continue.
Your personal budget should be cautious too.
A variable-income example
Suppose your household’s monthly gross income ranges from $7,000 to $10,000.
A $2,500 housing expense produces:
- 25% ratio in a $10,000 month
- 35.71% ratio in a $7,000 month
If $7,000 is the dependable month, build the household budget around that figure.
The stronger months can fund repairs, savings, or extra principal.
They should not be the only reason the required payment works.
A similar rent payment does not prove the mortgage fits
You may already be paying $2,200 in rent and considering a $2,200 mortgage-related payment.
That sounds like an easy switch.
But ownership may add costs your landlord currently handles:
- Repairs
- Maintenance
- Appliance replacement
- Exterior care
- Association assessments
- Higher utilities
The CFPB warns that mortgage qualification and standard affordability calculators do not account for every family and financial circumstance.
Rent comparison example
Current rent:
$2,200 per month
Proposed ownership costs:
- Mortgage-related payment: $2,200
- Maintenance fund: $300
- Additional utilities: $150
- Lawn and pest costs: $75
Complete ownership cost:
$2,200 + $300 + $150 + $75 = $2,725
Monthly increase:
$2,725 − $2,200 = $525
The mortgage payment matches the rent.
The housing budget does not.
How to calculate your housing ratio before applying
Step 1: Find your gross monthly income
Use income you reasonably expect the lender to accept and document.
Step 2: Estimate principal and interest
Use the proposed loan amount, term, and an up-to-date rate estimate.
Step 3: Add property taxes
Use property-specific information where available rather than a broad national estimate.
Step 4: Add homeowners insurance
Obtain a preliminary quote for the type of home you are considering.
Step 5: Add mortgage insurance
Include it when the loan and down payment are likely to require it.
Step 6: Add association dues and assessments
Include mandatory monthly costs even when they are paid separately.
Step 7: Divide by gross income
Housing expense ÷ gross income × 100
Step 8: Calculate total DTI
Add all required monthly debts and divide the total by gross income.
Step 9: Run a take-home budget
Add utilities, repairs, maintenance, savings, and your actual household expenses.
Step 10: Add a margin
Test the payment with higher taxes, insurance, and ordinary repair costs.
A first-time buyer housing worksheet
| Item | Your amount |
|---|---|
| Gross monthly income | |
| Monthly take-home income | |
| Principal and interest | |
| Property taxes | |
| Homeowners insurance | |
| Flood or supplementary insurance | |
| Mortgage insurance | |
| Association dues | |
| Other qualifying housing costs | |
| Total monthly housing expense | |
| Housing ratio | |
| Other monthly debts | |
| Total DTI | |
| Utilities | |
| Maintenance and repair fund | |
| Complete ownership budget |
Do not leave the difficult rows blank because you have not found the numbers yet.
Find the numbers before you find the house.
Ways to improve your housing ratio
Choose a lower home price
A lower price can reduce the mortgage, taxes, insurance, and possibly other costs.
Increase the down payment carefully
A larger down payment may lower principal and interest and reduce mortgage insurance.
Keep enough cash for closing, moving, emergencies, and repairs.
Improve the loan terms
A lower rate can reduce the payment supported by the same loan amount.
Compare multiple lenders using written Loan Estimates.
Consider a property with lower taxes or association dues
A less expensive monthly structure may matter more than a small difference in listing price.
Pay down selected debts
This improves total DTI rather than the housing ratio itself, but it may strengthen the application and household budget.
Wait for stable income
Waiting may help when income has recently increased but is difficult to document, or when variable income needs a longer history.
Buy with a qualified co-borrower
Adding an eligible co-borrower’s income can change the ratio, but their debts and credit profile may also enter the application.
Borrowing together creates shared legal responsibility.
It is not merely a calculator adjustment.
Common housing ratio mistakes
Using net income in the lender formula
The standard housing ratio uses qualifying gross income.
Use take-home pay in a separate personal budget.
Using only principal and interest
Add taxes, insurance, mortgage insurance, association dues, and other qualifying housing costs.
Treating 28% as a law
It is a planning guideline, not a universal approval threshold.
Assuming approval means comfort
The lender does not live inside your household budget.
Ignoring maintenance
Maintenance may not be in the underwriting ratio, but it will be in your bank account.
Using the seller’s tax bill without checking
The future tax amount may differ after a sale or reassessment.
Ask for a property-specific estimate.
Ignoring association fee increases
Review the current budget, reserves, assessments, and available association documents.
Using an outdated interest rate
A different rate can change the loan amount supported by the same monthly budget.
Counting income the lender may not accept
Discuss bonus, commission, overtime, rental, and self-employment income early.
Forgetting new debt before closing
A new auto loan, credit card balance, or furniture financing can change total DTI and the lender’s final review.
Frequently asked questions
What is a housing ratio?
It is the percentage of gross monthly income used by the proposed qualifying housing expense.
How do I calculate my housing ratio?
Divide the complete monthly housing expense by gross monthly income and multiply by 100.
What is a good housing ratio?
The 28% figure is a widely used planning guideline, while Freddie Mac consumer guidance generally places housing around 25% to 30% of gross income. Your appropriate ratio depends on the mortgage, other debts, income stability, savings, and household costs.
Can I qualify with a housing ratio above 28%?
Possibly. Lenders and loan programs evaluate the full application and may approve more or less than the guideline. Approval is not a promise that the payment will feel comfortable.
What is the difference between housing ratio and DTI?
The housing ratio includes the proposed monthly housing expense. Total DTI includes housing plus other monthly debts such as car loans, student loans, and credit card minimums.
Does the housing ratio use gross or net income?
It generally uses qualifying gross income before taxes and payroll deductions.
Are property taxes included?
Yes. The qualifying monthly housing expense normally includes real estate taxes.
Is homeowners insurance included?
Yes. Property insurance is generally included in the qualifying housing expense.
Is PMI included?
Yes. Applicable mortgage insurance belongs in the complete monthly housing calculation.
Are HOA fees included?
Applicable association dues are generally included even when paid separately from the mortgage bill.
Are utilities included?
Individual utility bills are generally outside the standard qualifying housing expense. Include them in your personal affordability budget.
Are home repairs included?
No, routine repairs and maintenance are generally not part of the lender-style housing ratio. You should still create a monthly repair and maintenance allowance.
Does rent count in the future housing ratio?
For a purchase decision, the proposed qualifying housing expense is the important figure. Your current rent may still help you judge whether you have successfully managed a similar monthly payment.
Can paying off a car improve my housing ratio?
It generally improves total DTI rather than the front-end housing ratio. That can still improve qualification and household cash flow.
Can a bigger down payment lower the ratio?
Yes. It may reduce the loan amount, principal and interest, and mortgage-insurance cost.
Can property taxes make one cheaper home less affordable?
Yes. A lower-priced property with higher taxes or association dues may produce a larger monthly housing expense.
Why did the lender calculate a different ratio?
The lender may use a different qualifying income amount, updated taxes or insurance, a required mortgage-insurance figure, association dues, or a different qualifying payment under the loan rules.
Does preapproval mean my ratio is safe?
No. Preapproval reflects the lender’s preliminary review. You still need to test the payment against take-home income, savings goals, repairs, utilities, and the rest of your spending.
Should I buy at the lender’s maximum approval?
Not automatically. The maximum may leave too little money for maintenance, emergencies, retirement savings, childcare, or other goals.
The bottom line
Your housing ratio is the proposed monthly housing expense divided by gross monthly income.
Use the complete expense, including principal, interest, property taxes, insurance, mortgage insurance, and applicable association dues.
The familiar 28% rule is a useful starting point.
It is not permission to ignore the rest of your budget.
Calculate the housing ratio, then calculate total DTI. After that, run the payment through your take-home income and add utilities, maintenance, repairs, and savings.
The lender uses the ratio to decide whether the mortgage may qualify.
You use the full budget to decide whether the home belongs in your life.