How Much House Can I Afford Calculator

Why this number is lower than other calculators

Run a $2,500 monthly budget through a calculator that only considers principal and interest and you get a home price of about $494,409. Include property tax and insurance — as this one does — and the same budget supports $388,010. That is a difference of roughly $106,000, and the second number is the one that reflects reality.

The gap exists because taxes and insurance scale with the home price. A bigger house does not just mean a bigger loan; it means a bigger tax bill and a bigger premium, both of which come out of the same $2,500. Calculators that ignore them are not wrong about the loan — they are answering a different question, one where the escrow costs are somebody else's problem.

On the default figures the breakdown is: $1,961.99 principal and interest, $388.01 property tax, $150.00 insurance. The escrow items take about 21.5% of the budget before the lender gets anything.

What an extra $100 a month buys

Because the relationship between budget and price is almost linear, there is a simple rule of thumb hiding in the numbers. Moving from $1,500 to $2,000 adds $82,556 of purchasing power; from $2,000 to $2,500 adds $82,555; from $2,500 to $3,000 adds another $82,555. Each additional dollar of monthly budget buys about $165 of home price.

That makes trade-offs concrete. Giving up a $300-a-month car payment is worth roughly $49,500 of house. A $200 raise applied to housing is worth about $33,000. It also cuts the other way: a $250 HOA fee in a community you like costs you about $41,000 of purchasing power — which is the honest price of that amenity.

The interest rate dominates everything else

Of all the inputs, the rate moves the answer the most, and it is the one you control least. Holding the $2,500 budget fixed: at 3% it supports a $537,409 home. At the 6.5% default, $388,010. At 7.5%, $356,400.

A single percentage point — 6.5% to 7.5% — costs about $31,610 of purchasing power, with no change to your income or your savings. The move from the 2021 era of 3% rates to today costs roughly $149,000, which is why affordability conversations changed so abruptly even for people whose salaries went up.

The practical consequence is that shopping the rate is worth more than negotiating the price in many cases. A quarter-point improvement on the rate is worth about $8,000 of house at these figures, which is a hard thing to achieve by haggling over the sale price.

A bigger down payment does not buy a bigger house

This one runs counter to intuition. Put down 10% instead of 20% and the price you can afford falls from $388,010 to $351,343 — about $36,667 less.

The reason is that a smaller down payment means a larger loan on the same house, and a larger loan means a larger monthly payment. If your budget is fixed at $2,500, borrowing more of the purchase price leaves less room for the purchase price itself. Lowering the down payment reduces the cash you need at closing; it does not increase what you can afford on a given monthly payment.

There is a second cost that this calculator does not add: under 20% down you will also pay PMI, which would push the affordable price down further. To see that effect, run the same budget through the PMI variant.

Location, taxes and fees

Two identical houses in two states do not cost the same to own, and the monthly budget does not travel with you.

• At a 1.2% property tax rate, a $2,500 budget supports $388,010.
• At 2.5%, the same budget supports $329,137 — about $58,873 less.
• Add a $400 monthly HOA fee and it falls to $321,966, because that fee is paid out of the same budget before the loan is sized.

HOA dues are the most underestimated of these. They are not escrow items that scale with the price — they are a fixed claim on your monthly budget that directly displaces borrowing capacity. A community with a $400 fee costs you about $66,000 of house compared with no fee, which is worth knowing before you decide that the pool is the deciding factor.

The cash you actually need

The down payment is not the whole cheque. On the default figures you need $77,602 at closing for the down payment, plus closing costs of roughly 2%–5% of the loan — about $9,300 at 3% on a $310,408 loan. Call it $87,000 in cash, before moving costs, inspections or any immediate repairs.

And that cash should not be all of your money. Buying at the top of your affordable range with your last dollar leaves you owning a house with no reserve for the roof, the water heater, or a gap in income. The monthly payment is only half the commitment; the other half is being able to absorb the things that go wrong.

What lenders check instead

This calculator works from your budget. Lenders work from ratios — conventionally, housing costs no more than 28% of gross monthly income, and all debts combined no more than 36%. A $2,500 payment sitting at the 28% line implies about $8,929 in gross monthly income, or roughly $107,000 a year.

If you carry a car loan, student loans or credit card balances, the 36% limit usually binds first and you will qualify for less than your budget suggests. The reverse is also true: your budget may be more conservative than what a lender will approve, and borrowing up to the approval limit is a choice, not a target.

How to use this number

Treat the result as a ceiling on the offer, not a target to aim at. A few things are worth doing with it before you start viewing houses.

• Run it at your local property tax rate, not the default. This is the single biggest source of error for most people.
• Try a shorter term — a 20-year loan drops the affordable price to $337,421, which tells you what the faster payoff costs in purchasing power.
• Add any HOA fee you are actually considering, because it comes straight out of the budget.
• Check the figure against your income using the 28/36 rule above, so you know whether your budget and the lender's view agree.
• Leave a margin. The payment that fits your budget today should also fit if insurance rises or your income is interrupted.