The 28/36 rule is the standard lenders use, but your actual limit depends on your other debts
Most mortgage lenders use the 28/36 rule to decide how much they will lend you. The rule says your monthly housing payment—mortgage, property tax, homeowners insurance, and HOA fees if you have them—should not exceed 28 percent of your gross monthly income. Your total debt payments, including the mortgage, car loans, credit cards, and student loans, should not exceed 36 percent of gross income.
These are not hard limits. Some lenders will go higher if you have a large down payment, excellent credit, or stable income. Others will stay stricter. The point is that lenders have learned, over decades, that borrowers who spend more than this tend to miss payments or default. If you are approved for a mortgage that pushes you past 28 percent, that does not mean it is safe—it means the lender thinks you can technically afford it, not that you should.
Your actual safe limit is lower if you carry other debt. If you owe $400 a month on car loans and credit cards, and your gross income is $5,000 a month, then your total debt ceiling is $1,800 (36 percent). Subtract the $400 you already owe, and you have $1,400 left for housing. That is 28 percent of your income, which matches the housing rule—but only because your other debts consumed part of your allowance.
Key Takeaways
- The 28/36 rule means housing costs should be no more than 28 percent of gross monthly income, and all debt payments combined should not exceed 36 percent.
- If you carry car loans, credit cards, or student loans, your housing budget shrinks because those payments count toward the 36 percent total.
- Lenders may approve you for more than 28 percent, but that does not mean the payment is affordable for your actual life—it means you technically may have access to.
- Your take-home pay (after taxes) is what you actually spend, so a payment that is 28 percent of gross income may feel much tighter than 28 percent of net income.
Why lenders use 28 percent, not a higher number
The 28 percent threshold exists because housing is usually the largest expense in a household budget. After you pay the mortgage, property tax, insurance, and utilities, you still need to cover food, transportation, childcare, medical care, and everything else. If housing takes more than 28 percent, the math breaks down for most people.
Lenders learned this through loss data. When borrowers spend 35 or 40 percent of income on housing, they start cutting other expenses—they skip car maintenance, delay medical care, or stop saving. When an emergency hits, they have no buffer, and the mortgage payment becomes the first thing they cannot make. The 28 percent rule is not arbitrary; it is the point where default risk rises sharply.
That said, the rule assumes you have no other major debts. If you own your car outright and have no student loans, you might safely go higher. If you are still paying off a car loan and have credit card balances, you should stay well below 28 percent.
How to calculate your own 28 percent limit
Start with your gross monthly income—the amount before taxes, not what hits your bank account. If you are salaried, divide your annual salary by 12. If you are paid hourly, multiply your hourly rate by the number of hours you expect to work in a month (usually 160 for full-time). If your income varies, use an average of the last two years, or use the lower of the last two years if you are applying for a mortgage.
Multiply that gross income by 0.28. That is your housing budget ceiling. For example, if your gross income is $5,000 a month, 28 percent is $1,400. That $1,400 includes the mortgage principal and interest, property tax, homeowners insurance, and HOA fees—everything that is part of your monthly housing obligation.
Do the same calculation for 36 percent to find your total debt ceiling. If you already have car payments, credit card minimums, or student loan payments, add those up and subtract from the 36 percent number. What is left is the maximum you should spend on housing.
| Gross Monthly Income | 28% Housing Limit | 36% Total Debt Limit |
|---|---|---|
| $3,000 | $840 | $1,080 |
| $4,000 | $1,120 | $1,440 |
| $5,000 | $1,400 | $1,800 |
| $6,000 | $1,680 | $2,160 |
| $7,000 | $1,960 | $2,520 |
The difference between gross income and take-home pay matters
The 28/36 rule uses gross income, not net income. That is important because it makes the numbers look more comfortable than they actually are. If your gross income is $5,000 a month but taxes, Social Security, and health insurance take out $1,000, your take-home is $4,000. A $1,400 housing payment is 28 percent of gross income, but it is 35 percent of what you actually receive.
When you are deciding whether a house payment feels manageable, think in terms of take-home pay. Lenders use gross income because it is standardized and verifiable, but you spend take-home. If a lender approves you for a payment that is 28 percent of gross income, calculate what percentage it is of your actual net pay. If that number makes you uncomfortable, the house is probably too expensive for your situation, even if the lender says yes.
When you can safely go above 28 percent
Some borrowers can handle housing costs above 28 percent. This usually happens when you have very low other debt, a large emergency fund, and stable income that is unlikely to drop. If you own your car, have no student loans, and carry no credit card balance, you might safely spend 30 or 32 percent on housing.
You can also go higher if your income is very high relative to your expenses. A household earning $200,000 a year can absorb a housing payment that is 30 percent of income more easily than a household earning $40,000, because the remaining 70 percent still covers everything else comfortably.
The risk increases sharply above 35 percent. At that level, you are betting that nothing will go wrong—no job loss, no major repair, no medical emergency. Most financial advisors recommend staying below 30 percent if you can, and certainly below 28 percent if you carry any other debt.
What happens if your housing payment creeps above your limit
If you are already in a house and your payment is above 28 percent—because you took out a larger mortgage than you should have, or because your income dropped—you have a few options. You can refinance to a longer loan term, which lowers the monthly payment but increases the total interest you pay. You can look into a loan modification with your lender if you are struggling. You can rent out a room or part of the house to bring in extra income. Or you can sell and buy something smaller.
The worst option is to ignore it and hope your income rises enough to make the payment comfortable. Income does not always rise, and housing costs tend to stay stable or increase. If you are stretched too thin, the problem usually gets worse, not better.
Frequently Asked Questions
Does the 28 percent rule include property tax and insurance?
Yes. The 28 percent limit covers the full housing payment: mortgage principal and interest, property tax, homeowners insurance, and HOA fees if you have them. It does not include utilities, maintenance, or repairs, but those are separate budget items.
What if my income is irregular or seasonal?
Lenders typically average your income over the last two years, or use the lower of the last two years if it varies significantly. If you are self-employed or work seasonal jobs, gather tax returns and profit-and-loss statements to show the lender your actual average income. Do not overstate what you expect to earn.
Can I go above 28 percent if I have a large down payment?
A large down payment reduces the amount you borrow, which lowers your monthly payment, but it does not change the 28 percent rule itself. However, lenders may be more flexible with borrowers who put down 20 percent or more, because the lower loan-to-value ratio reduces their risk. You might still may have access to for a higher payment, but that does not mean it is safe for your budget.
Should I include my spouse's income if we are buying together?
Yes. Lenders will use combined gross income for a joint application. If one spouse earns $3,000 and the other earns $4,000, your combined gross income is $7,000, and 28 percent is $1,960. If one spouse loses their job, you will need to refinance or adjust your budget, so be realistic about what happens if one income disappears.
Is 28 percent the same as what I can afford?
No. The 28 percent rule is what lenders will lend, not what is comfortable for your life. If you have irregular expenses, dependents, or little savings, you should aim for 20 to 25 percent instead. If you have stable income, low other debt, and a solid emergency fund, you might handle 28 percent. Only you know your actual situation.