How Much House Can You Afford?

Affordability guide

How much house can you actually afford?

I built this site so you can run numbers without a sales pitch. The calculator above is useful, but the bigger question is what those numbers mean for your life. Lenders approve loans. You still have to live with the payment. Here is how I think about affordability in plain English.

The 28/36 rule, without the jargon

The classic guideline is simple. Aim to keep housing costs near 28% of your gross monthly income. Keep total monthly debts (housing plus credit cards, car loans, student loans, and similar obligations) near 36%. Gross means before taxes. Housing usually means principal, interest, taxes, and insurance, and often HOA dues when they apply.

Lenders use debt to income (DTI) because it is a quick way to estimate repayment risk. Many programs allow higher ratios than 36% when the rest of your file is strong. That does not mean you should spend every dollar they will lend you. Approval is a ceiling. Comfort is a choice. If a payment only works when nothing goes wrong, it is already too high.

Hypothetical example: you earn $7,500 a month before taxes. At 28%, housing is about $2,100. At 36% total debt, all debts combined should stay near $2,700. If you already pay $600 toward other loans, you have roughly $2,100 left for housing. Run your own income and debts in the calculator above, then pressure test the result with the monthly payment calculator.

What goes into your monthly payment

People often quote the principal and interest number from a rate sheet and call it the payment. That is only part of the picture. Most homeowners pay PITI, and many also pay PMI or HOA fees.

Principal

Principal is the portion of each payment that reduces your loan balance. Early in a long loan, principal is a smaller slice of the payment. Later, more of each payment goes to principal.

Interest

Interest is the cost of borrowing. Your rate, loan amount, and term drive it. A higher rate or a larger loan raises the interest piece quickly, even when the home price looks similar.

Property taxes

Property taxes are set by local governments and can change over time. They vary widely by city and county. Buyers moving from rentals often underestimate this line because it never appeared on a lease.

Homeowners insurance

Insurance protects the structure (and often liability). Location, home age, rebuild cost, and coverage choices all matter. Coastal or high risk areas can see much higher premiums.

PMI and HOA dues

Private mortgage insurance (PMI) usually appears on conventional loans when you put less than 20% down. HOA dues are separate monthly or annual fees for shared amenities and maintenance. Neither is optional when your loan or community requires it. For a deeper walkthrough of PMI, see our guide on what PMI is and how to avoid it.

How your down payment changes everything

A larger down payment lowers the loan amount. That usually means a lower monthly payment and less total interest over the life of the loan. On many conventional loans, reaching 20% equity (at purchase or later) is also the path to canceling PMI.

The 20% threshold is real and useful. It is not a moral rule. Waiting years to save a full 20% can cost you if rents rise, if prices move, or if you delay building equity and stability you actually need. Putting 5% or 10% down can be a rational choice when the payment still fits, you keep cash reserves, and you understand PMI. Putting almost everything you own into the down payment and arriving at closing with an empty emergency fund is a different story.

Hypothetical: on a $400,000 home, 5% down is $20,000 and leaves a $380,000 loan. Twenty percent down is $80,000 and leaves a $320,000 loan. The second path often means a lower payment and no PMI, but it also means $60,000 more cash up front. Which is better depends on your savings, timeline, and risk tolerance. Compare scenarios in our down payment guide and the calculator above.

How credit score affects what you can afford

Your credit score does not change the sticker price of the house. It changes the rate lenders offer, and the rate changes the payment. A better score can mean a lower rate, which can support a slightly higher purchase price at the same monthly budget, or the same price with more breathing room.

Hypothetical illustration only: on a $320,000 loan with a 30 year term, a rate near 6.25% produces a different principal and interest payment than a rate near 7.25%. That gap can easily land around $200 a month depending on exact terms. Over many years, the interest difference compounds into a large total. I am not quoting a live market rate for your situation. I am showing why shopping your rate and improving credit before you apply can move affordability more than people expect. Model a few rate assumptions so you are not surprised at the Loan Estimate.

Costs buyers forget to plan for

Affordability is not only the mortgage payment. Closing costs commonly land in a range of roughly 2% to 5% of the purchase price, depending on location, loan type, and credits. That money is separate from the down payment. Read our closing costs explained guide before you treat your savings as fully available for the down payment.

After closing, budget for moving, deposits for utilities, immediate repairs the inspection flagged, and basic furnishings if you are going from a smaller rental to a larger home. Utilities are often higher than renters expect. Maintenance is the quiet line item that breaks tight budgets. A common planning rule is to set aside about 1% of the home's value per year for repairs and upkeep, knowing some years will cost less and some will cost more.

If you want a checklist view of the full path from credit check to keys, use our free First Time Homebuyer Playbook.

Signs you are stretching too far

A loan can be approvable and still be a poor fit. Watch for these patterns.

• You would empty your emergency fund to close, with no cash left for a surprise repair in month one.
• Your DTI sits at the upper limit of what a program allows, with no cushion for a car repair or medical bill.
• The payment only works if a future raise, bonus, or side income arrives on schedule.
• You are counting on perfect health, perfect employment, and perfect luck for the next several years.
• There is no room in the budget for maintenance, higher utilities, or a modest lifestyle change after you move.

None of that means you should never buy. It means the right house is the one you can carry through an ordinary bad month, not only through a perfect month. If the calculator shows a number that makes your stomach tighten, listen to that. Lower the price target, increase the down payment, pay down other debts, or give yourself more time.

This guide is general educational information only. It is not financial, tax, or lending advice. Rates, fees, taxes, insurance, and program rules change. Confirm figures with a licensed loan officer and your own budget before you make an offer.