The 28/36 Rule: The Math Lenders Actually Use

Most lenders lean on a shorthand called the 28/36 rule to decide how much mortgage you can qualify for. It's two ratios, both measured against your gross (pre-tax) monthly income — which matters, because your take-home pay is lower, and that's part of why the bank's number can feel tight in real life.

• Front-end ratio (28%): your total monthly housing payment — principal, interest, taxes, insurance, plus PMI and HOA if you have them — should generally stay at or below about 28% of your gross monthly income.
• Back-end ratio (36%): your total monthly debt — housing payment plus car loans, student loans, credit-card minimums, and other recurring debts — should generally stay at or below about 36% of your gross monthly income.

Lenders calculate what's called your debt-to-income ratio (DTI) to underwrite your loan, and some loan programs allow a higher back-end ratio than 36% — which is exactly why a lender's maximum approval can end up higher than what actually feels comfortable to pay every month. See the next section for real numbers on how much higher.

So, How Much Mortgage Can You Actually Qualify For?

Whichever ratio is more restrictive for your situation is generally the one that sets your ceiling. That number is a maximum, not a target — see the section below on why aiming below it usually makes for a happier homeowner.

The 25% Take-Home Pay Rule: A Stricter Alternative

The 28/36 rule isn't the only popular framework for this question. Personal-finance author and radio host Dave Ramsey recommends a stricter guideline: keep your total housing payment at or below 25% of your monthly take-home (net, after-tax) pay, and pair it with a 15-year fixed-rate mortgage instead of a 30-year one.

The two methods can point to very different numbers for the same household. Gross-income rules like 28/36 tend to allow a larger loan spread over 30 years; the take-home-pay rule shrinks both the loan term and the ceiling, trading buying power today for less interest paid and more monthly margin over time. Neither is objectively "correct" — it's worth running your numbers both ways with the calculator above before deciding which trade-off fits you.

How Much House Can You Afford on $60k, $80k, or $100k?

The table at the top of this page gives you a starting ballpark. Here's how those numbers actually come together, and why they're illustrative rather than guaranteed.

Each figure applies the 28% front-end ceiling to gross monthly income, then backs into a home price using a 6.69% 30-year fixed rate (Freddie Mac's national weekly average for the week ending August 6, 2026), a roughly 20% down payment, and an estimated 1.3% combined annual cost for property taxes and homeowners insurance, which varies a lot by state and county. It assumes minimal other monthly debt — add a car payment or student loans, and your real ceiling drops, because the back-end (36%) test starts to bind instead.

This is the single biggest reason a "how much house can I afford" number is never one fixed answer: a higher interest rate or more existing debt sharply lowers the home price a given income can support, even if your salary hasn't changed at all. A one-point swing in mortgage rates can move your affordable price range by tens of thousands of dollars. Run your own numbers with your actual rate quote, debts, and local tax rate rather than treating any example here as a promise.

How Much House Can You Afford on $80k a Year With Student Loans?

Student loan payments are exactly the kind of debt that can flip which ratio binds. On an $80,000 income, the 28% front-end ceiling alone allows about $1,867 a month for housing. A single, modest student loan payment usually isn't enough to change that — the worked example above shows a household with $450 in combined car and student loan debt still bound by that same $1,867 front-end ceiling. But once your other monthly debts climb past roughly $530, the math flips: with, say, a $400 car payment and a $300 student loan payment ($700 total), the 36% back-end ceiling leaves only about $1,700 for housing — now the tighter number. That's a real cut to your budget, and it can lower the home price you can comfortably reach by tens of thousands of dollars. If you're carrying meaningful student debt, run your actual numbers in the calculator above rather than relying on an income-only estimate.

"The Bank Approved Me for More Than I Can Afford"

Short answer: is the bank's approval amount safe to spend on a house? Not always — here's the gap this section untangles.

This is the sentence that trips up a lot of first-time buyers, and it's usually true. The bank approves the maximum its debt-to-income limits allow — not the amount that leaves you comfortable. Those are two different numbers, and confusing them is how people end up house poor: technically able to make the mortgage payment, but with little left over for savings, emergencies, or simply living.

Here's how much room that gap can actually be. Under Fannie Mae's own underwriting guidelines, a manually underwritten loan caps total DTI at 36% — but that maximum can stretch to 45% for borrowers who meet certain credit-score and reserve requirements, and loans run through Fannie Mae's automated underwriting system can be approved up to a 50% DTI. That's the difference between a comfortable 36% ceiling and a bank-approved loan eating half of your gross income — both are "approved," but only one leaves room to live.

FHA loans follow their own script. FHA guidelines generally cap the front-end ratio around 31% and the back-end ratio around 43% of gross income — but with strong compensating factors like extra cash reserves or a higher credit score, some FHA lenders will approve back-end ratios into the 50s. That's one reason a result from an FHA loan affordability calculator can come in higher than a conventional one for the same borrower, and another example of how "approved" keeps meaning something different depending on the loan program.

Your loan amount has its own ceiling, too. For 2026, the maximum mortgage limit for a conventional conforming loan is $832,750 across most of the country, rising to $1,249,125 in designated high-cost areas; FHA loan limits run from roughly $541,287 in lower-cost counties up to that same $1,249,125 ceiling in high-cost ones. Borrowing above these figures generally means moving into jumbo-loan territory, which typically comes with its own, often stricter, qualifying rules.

For many buyers, a more comfortable target is a housing payment below the 28% ceiling — leaving room for retirement savings, an emergency fund, and the irregular costs that come with owning a home. Building the rest of your monthly budget around that lower number, rather than the bank's maximum, is worth doing before you shop — our guide to building a budget that actually works walks through how.

The True Cost of a Home (It's Not Just the Payment)

When people talk about "the mortgage payment," they usually mean four things bundled together, known in the industry as PITI:

• Principal — the portion that pays down what you borrowed
• Interest — the cost of borrowing the money
• Taxes — property taxes, usually collected monthly by your lender and paid out on your behalf
• Insurance — your homeowners insurance premium

Principal and interest together are often called the P&I payment — that's the number a loan quote usually leads with, and it's smaller than your real monthly cost once taxes and insurance are added in.

PMI generally applies when you put down less than 20% of the purchase price on a conventional loan, and it protects the lender, not you — it's an added monthly cost until you build enough equity to have it removed (our guide to removing PMI covers exactly how). Homeowners insurance is its own line item worth shopping carefully — see our homeowners insurance guide for what typically drives the cost up or down.

Then there's maintenance, the cost buyers underestimate most. A widely used rule of thumb is to budget roughly 1% of the home's value every year for upkeep and repairs — more for an older home, less for new construction in good condition. On top of the monthly numbers, remember the upfront costs too: your down payment plus closing costs, covered in detail next.

Don't Forget Closing Costs (2%–6% of the Purchase Price)

The down payment gets all the attention, but it isn't the only cash you need on closing day. Closing costs — a bundle of lender, title, and government fees — typically run 2% to 6% of the home's purchase price, on top of your down payment. On a $350,000 home, that's roughly $7,000 to $21,000 due at closing, separate from whatever you've saved toward the down payment itself. It's the upfront shock that catches a lot of first-time buyers off guard.

Some of this is negotiable — sellers can sometimes cover part of it, and certain loan programs let you roll a portion into the loan itself — but budgeting for it separately from your down payment is what keeps closing day from becoming a financial surprise. The CFPB's guide to closing disclosures walks through how to check the final numbers a few days before you sign.

How the Down Payment Changes What You Can Afford

It's easy to conflate two different levers, so here's the untangling: your income mainly determines the monthly payment you can carry, and your down payment mainly determines the price you can reach — plus whether you owe PMI at all.

You usually don't need 20% down — many loan programs allow considerably less — but a smaller down payment means a bigger loan, a higher monthly payment, and typically PMI on top. Which program fits your situation, and how much down each one actually requires, depends on your loan type; our home loans guide walks through the options and qualifying details.

How Your Credit Score Changes the Math

Your down payment and income aren't the only levers — your credit score moves the interest rate you're offered, and rate moves affordability more than most people expect. Lenders price mortgages in tiers, and the gap between a fair score and an excellent one is usually worth real monthly money.

Because rate moves the P&I portion of your payment, a better score doesn't just save money each month — it directly raises the home price a given income can support, the same way a bigger down payment does. If your score isn't where you'd like it yet, paying down revolving balances and fixing any credit report errors are usually the fastest ways to move up a pricing tier before you apply; see Bankrate's breakdown of current rate tiers for up-to-date ranges.

How State Property Taxes Change the Math

The 1.3% combined tax-and-insurance estimate used throughout this page is a national blend — your actual property tax rate depends entirely on where you buy, and the spread between states is enormous.

On a $350,000 home, that spread is the difference between roughly $1,400 a year in Alabama and around $7,000 a year in New Jersey — money that comes straight out of your monthly PITI budget before you've paid a dollar of principal. States without an income tax, like Texas, often lean harder on property taxes to fund schools and local government, so "no income tax" doesn't automatically mean "cheap to own a home." Before you run the numbers for a specific house, swap this page's 1.3% assumption for your county's actual rate — effective property tax rates by state are a good starting point, but your county assessor's site has the number that actually applies to you.

Frequently Asked Questions

How much house can I afford on my salary?

A common starting point is the 28/36 rule: keep your housing payment under about 28% of your gross monthly income, and your total debt under about 36%. From there, your actual number depends on your interest rate, down payment, other debts, and local taxes — see the income table above for illustrative ranges.

What is the 28/36 rule?

It's a lending guideline with two parts: your monthly housing payment should generally stay at or below about 28% of your gross income (the front-end ratio), and your total monthly debt, including housing, should stay at or below about 36% (the back-end ratio).

How much house can I afford on $60k, $80k, or $100k a year?

Using a 28% front-end ceiling and the assumptions in the table above (a 6.69% rate, about 20% down, minimal other debt), that's roughly $210,000–$230,000 on $60k, roughly $280,000–$310,000 on $80k, and roughly $355,000–$390,000 on $100k. These are illustrative — your real number will differ.

What income do I need for a $300,000 house?

Under the same illustrative assumptions, a household income of roughly $80,000–$85,000 a year lines up with a $300,000 home — but a higher rate, less down, or more existing debt would raise that number.

Should I buy the most expensive house the bank approves me for?

Generally, no. The bank's approval reflects the maximum your debt-to-income ratio allows, not what leaves you room for savings, emergencies, or everyday life. Many buyers are more comfortable aiming below that ceiling.

What does "house poor" mean?

It means so much of your income goes toward housing costs that little is left for savings, emergencies, or discretionary spending — even though you can technically make the payment.

What is PITI, and what's included in my monthly payment?

PITI stands for principal, interest, taxes, and insurance — the four components of a typical mortgage payment. Depending on your loan, PMI and HOA dues can add to that total.

What costs are there besides the mortgage payment?

Beyond PITI, budget for PMI if you put down less than 20%, HOA dues if applicable, utilities, and ongoing maintenance — plus upfront closing costs at purchase.

How much should I budget for home maintenance?

A common rule of thumb is about 1% of the home's value per year, adjusted upward for an older home or downward for new construction in good condition.

How much down payment do I actually need?

Less than you might think — many loan programs allow well under 20% down. A smaller down payment means a larger loan, a higher monthly payment, and usually PMI until you build more equity.

Does a bigger down payment let me afford a more expensive house?

Yes. A larger down payment lowers your loan amount and monthly payment, and can eliminate PMI, which together can let a given monthly budget stretch to a higher purchase price.

Does the affordability number use my gross or take-home income?

Lenders calculate DTI ratios using gross (pre-tax) income, which is one reason the bank's maximum can feel tighter in practice than it looks on paper — your actual take-home pay is lower.

How much house can I afford with a dual or combined household income?

The same 28/36 math applies — lenders add both incomes together and also add together both borrowers' debts, then apply the same ratios to the combined totals. Two moderate incomes with light debt often qualify for meaningfully more than either income alone, but a large debt carried by either borrower still drags on the shared back-end ratio.

What is the 3x salary rule for buying a house, and is it accurate in 2026?

It's a rough shorthand: buy a home worth roughly 3 to 5 times your annual income. It's easy to remember, but unlike the 28/36 rule, it doesn't account for your actual interest rate, down payment, or existing debt. At 2026's mortgage rates, a multiple closer to 3–4x tends to line up with what the 28/36 math actually supports for a household with average debt and about 20% down — so treat it as a quick sanity check, not a substitute for running your real numbers.

What income do I need for a $500,000 house?

Under the same illustrative assumptions used throughout this page (a 6.69% rate, about 20% down, minimal other debt), a household income of roughly $130,000–$140,000 a year lines up with a $500,000 home. A higher rate, a smaller down payment, or more existing debt would push that number higher.

What are closing costs, and do they affect how much house I can afford?

Closing costs are the lender, title, and government fees due at signing — typically 2% to 6% of the purchase price, on top of your down payment. Because that cash comes from the same savings as your down payment, a bigger closing-cost bill can mean less left over for the down payment itself, which raises your loan amount, your monthly payment, and possibly triggers PMI. Budget for both together, not just one or the other.

Can I afford a house if I have substantial student loan debt?

It depends on the payment size relative to your income, not the loan balance itself. Lenders count your actual monthly student loan payment (or a calculated minimum if you're on an income-driven plan) against the 36% back-end ceiling alongside your housing payment. A large enough student loan payment can flip which ratio binds — from the 28% front-end ceiling to the tighter 36% back-end one — see the worked $80k example above for how much that can shrink your budget.

How does a car payment lower my home purchase budget?

The same way a student loan payment does: it counts toward the 36% back-end debt ceiling dollar-for-dollar. Every $100 in car payment is $100 less room for housing once your total debt approaches that ceiling, and paying off or trading down a car loan before you apply can meaningfully raise the mortgage you qualify for.

Can I afford a $400,000 house on a $100,000 salary?

It's close, but on the tight side. Under this page's standard assumptions (20% down, 6.69% rate, minimal other debt), a $100,000 income comfortably supports a home price closer to $370,000–$390,000 under the conservative 28% front-end ceiling. Reaching $400,000 usually means leaning toward the higher 36% back-end ceiling instead (realistic mainly if you're carrying little to no other debt), adding a larger down payment, or securing a lower rate. It's doable, but it sits closer to what a bank might approve than what this page calls comfortably affordable.