The 28/36 rule is the standard lenders use, but your actual number depends on your other debts and local costs

Most mortgage lenders will not approve you for a loan where your monthly house payment exceeds 28 percent of your gross monthly income. That is the front-end ratio, and it is the ceiling lenders treat as the maximum safe housing cost. If you earn $5,000 a month before taxes, lenders typically cap your house payment at $1,400.

But lenders also look at your back-end ratio—your total monthly debt payments (mortgage, car loans, credit cards, student loans, everything) should not exceed 36 percent of gross income. If your other debts are high, your actual house payment ceiling will be lower than 28 percent even if the lender would technically approve it. A $5,000 monthly income with $800 in car and student loan payments means your house payment should stay around $1,000 to stay within the 36 percent total.

These are lending rules, not rules about what you can actually afford to live on. A house payment that fits the 28/36 formula may still leave you short for utilities, insurance, property tax, maintenance, and food. Your real number depends on what else costs money in your life.

Key Takeaways

  • Lenders typically cap your house payment at 28 percent of your gross monthly income, but will not exceed 36 percent when combined with all other debt payments.
  • Your actual safe house payment is lower if you carry car loans, student loans, credit card balances, or other monthly obligations.
  • The 28/36 rule is what lenders will fund, not necessarily what leaves you money for property tax, insurance, maintenance, and living expenses.
  • Property tax and homeowners insurance vary by location and can add 20 to 40 percent to your actual monthly housing cost on top of the mortgage payment itself.

Why lenders use the 28 percent ceiling

The 28 percent front-end ratio comes from decades of mortgage data showing that borrowers who spend more than that on housing alone are more likely to default. Lenders are protecting themselves, not you. A payment that fits their formula has historically meant lower risk to them—not that you will have money left over after you pay it.

The 36 percent back-end ratio exists because lenders know that people with multiple debts stretch thinner than people with just a mortgage. If you are already paying $400 a month on a car and $300 on student loans, adding a $1,400 house payment puts you at $2,100 in debt service alone. On a $5,000 income, that is 42 percent, and most lenders will decline you even if the house payment alone would have been approved.

Some lenders will go higher—up to 43 percent back-end—if you have a large down payment, excellent credit, or significant savings. But these are exceptions, and even when lenders approve them, it does not mean the payment is sustainable for your household.

What the 28/36 rule does not include

Your mortgage payment is only part of your housing cost. Property tax, homeowners insurance, and mortgage insurance (if you put down less than 20 percent) are separate bills that come monthly. In many states, property tax alone can add $200 to $600 a month to a $1,400 mortgage payment. In high-tax areas, it can be much higher.

Homeowners insurance typically runs $100 to $300 a month depending on the home value and your location. If you are financing less than 80 percent of the home's value, you will also pay private mortgage insurance (PMI), which can be $100 to $300 monthly until you reach 20 percent equity.

The 28 percent rule usually refers to the mortgage payment alone—principal, interest, and sometimes property tax and insurance if they are escrowed into the payment. But even when tax and insurance are included, the rule does not account for maintenance, repairs, utilities, or the fact that you need to eat and pay other bills too. A house payment that fits the 28/36 formula can still leave you unable to afford the house.

How to calculate your actual safe house payment

Start with your gross monthly income—the number before taxes. Multiply it by 0.28 to find the lender's ceiling. Then list every monthly debt payment: car loans, student loans, credit cards (use the minimum payment, not the balance), personal loans, anything with a monthly bill. Add those up and subtract from 36 percent of your gross income. The result is the maximum house payment that keeps you within the back-end ratio.

Example: You earn $6,000 a month gross. Your car payment is $350 and student loans are $200. The 28 percent ceiling is $1,680. The 36 percent total is $2,160. Subtract your $550 in other debts: $2,160 − $550 = $1,610. Your house payment should not exceed $1,610 to stay within the back-end ratio, even though the front-end rule would allow $1,680.

Then subtract property tax and insurance from that number to find what you can actually afford to borrow. If your area's property tax is $300 a month and insurance is $150, subtract $450 from your $1,610 ceiling. That leaves $1,160 for the actual mortgage payment (principal and interest). A mortgage calculator will tell you how much you can borrow at current interest rates for that payment.

Regional differences in housing costs

The 28/36 rule is national, but what it actually buys you varies enormously by location. In rural areas and parts of the Midwest, a $1,400 house payment might cover a three-bedroom home with a yard. In coastal cities and high-demand metros, the same payment might be a down payment on a one-bedroom condo.

Property tax also varies by state. New Jersey, Illinois, and Connecticut have effective property tax rates above 2 percent of home value annually. Texas, Louisiana, and Alabama are below 0.5 percent. On a $300,000 home, that difference is $300 to $600 a month. Some states have no income tax but high property tax; others do the reverse. Your actual housing cost depends heavily on where you buy.

Before you settle on a house payment number, research the property tax rate and average homeowners insurance cost in the specific county or neighborhood you are considering. These vary within states too. A house in a flood zone or high-crime area will have higher insurance. A house in a wealthy suburb may have higher property tax than one ten miles away.

When the 28/36 rule does not fit your situation

Some people earn irregular income—freelancers, commission-based workers, seasonal employees. Lenders typically average your income over two years and may require tax returns or profit-and-loss statements to verify it. Your approved house payment may be lower than the 28 percent rule suggests because your income is not stable.

If you have a large down payment (30 percent or more), excellent credit (740+), and significant savings, some lenders will stretch the ratios to 40 or 43 percent back-end. But this is not common, and it still does not mean the payment is safe for your budget. Lenders are willing to take the risk; that does not mean you should.

Self-employed borrowers, recent immigrants, people with thin credit files, or those with past late payments or collections may face stricter limits. Some lenders will only go to 25 percent front-end for these borrowers, even though others would approve 28 percent.

The difference between what you can afford and what you can borrow

A lender's approval is not a measure of what you can afford. It is a measure of what the lender thinks you are unlikely to default on. Those are not the same thing. You can be approved for a $1,400 house payment and still struggle to pay utilities, maintain the home, and cover unexpected repairs.

Financial advisors often recommend keeping your house payment to 25 percent of gross income or lower, especially if you have other debts or irregular expenses. This leaves more room for property tax, insurance, maintenance, and the rest of your life. The 28/36 rule is what lenders will fund; a lower number is what tends to feel sustainable.

Before you commit to a house payment, build a full monthly budget that includes property tax, insurance, utilities, maintenance reserves (most experts suggest 1 percent of home value annually), and everything else you spend money on. If the house payment leaves you with less than one month of expenses in savings after all other bills, it is probably too high, regardless of what the lender approved.

Frequently Asked Questions

Can I get approved for a house payment higher than 28 percent of my income?

Yes. Lenders can approve up to 36 percent of gross income when combined with all other debts, and some will go to 40 or 43 percent if you have a large down payment, excellent credit, or significant savings. But approval does not mean affordability—it means the lender thinks you will not default, not that you will have money left over for other expenses.

Does the 28 percent rule include property tax and insurance?

It depends on the lender. Some include property tax and insurance in the 28 percent calculation if they are escrowed into your monthly payment. Others count only the mortgage payment itself. Ask your lender which number they use when they quote your approval amount, because it changes what you can actually borrow.

What if my property tax is really high in my area?

Research the specific tax rate before you buy. If your area has high property tax, your actual house payment ceiling is lower than the 28 percent rule suggests, because more of your housing budget goes to tax instead of mortgage. A mortgage calculator that includes property tax will show you the real number.

Should I spend the full 28 percent on my house payment?

Not necessarily. The 28 percent rule is a lender's ceiling, not a target. If you can afford less and still buy the home you want, do it. A lower house payment means more money for maintenance, repairs, emergencies, and the rest of your life. Many people find that 20 to 25 percent of income is more sustainable than the full 28 percent.

What happens if I get approved but the payment feels too high?

You can decline the approval or ask the lender for a lower amount. You are not obligated to borrow the maximum they will lend. If the payment leaves you uncomfortable or unable to cover other expenses, it is too high, regardless of what the lender says. Walk away or negotiate for a less expensive home.