What does a $450k house cost per month at 20% down?
A $450,000 house with 20% down costs about $2,875 a month, not the $2,275 a mortgage calculator shows. The difference is $450 of property tax, $150 of insurance, which together add 26% on top of the loan payment.
A mortgage calculator answers a narrower question than the one you're asking. It gives principal and interest, $2,275 here on a $360,000 loan at 6.50%. What leaves your account each month is $2,875, because the lender also collects property tax and insurance and holds them in escrow.
Those two are permanent. Property tax is charged on the house, not the loan, so it doesn't end when the mortgage does, and both tend to rise with the value of the home. Here they add $600 a month between them.
At 20% down there's no PMI, which is the main financial argument for reaching that threshold. Below it the lender adds a monthly charge that insures the lender and not you, and on this price it would be roughly $287 a month.
The gap matters most when you're deciding what you can afford. Budgeting on the loan payment alone understates the real number by 26% here, which is the difference between a house that fits and one that quietly doesn't.
Still missing from this figure: HOA dues, which can run to several hundred a month on a condo, and maintenance, which is real even in a year you spend nothing. A common planning rule sets aside 1% of the purchase price a year for upkeep, about $375 a month on this house.
Purchase price vs outcome
The same question at every purchase price, so you can use the one you believe.
| Purchase price | Real monthly cost at 20% down |
|---|---|
| $250,000 | $1,597 |
| $350,000 | $2,236 |
| $450,000this page | $2,875 |
| $600,000 | $3,834 |
| $800,000 | $5,112 |
A 6.50% 30-year fixed loan, property tax at 1.2% and insurance at 0.4% of the price a year. Both vary a lot by state and by house, so treat them as a starting point rather than a quote. HOA dues and maintenance are not included.
Assumptions
- Purchase Price
- 450000
- Down Payment Percent
- 20
- Loan Amount
- 360000
- Principal And Interest
- 2275
- Property Tax Monthly
- 450
- Insurance Monthly
- 150
- Pmi Monthly
- 0
- Total Monthly
- 2875
Frequently asked
What is the monthly payment on a $450k house with 20% down?
About $2,875 a month all in: $2,275 of principal and interest, $450 of property tax, $150 of insurance. HOA dues and maintenance are on top.
Why is it more than the mortgage calculator said?
Because a mortgage calculator gives principal and interest only. Tax and insurance are collected alongside it in escrow, and they add 26% here. That's the number people are surprised by.
When does PMI stop?
At 20% equity. You can get there by paying down the loan or by the house appreciating, and you can usually request removal once you reach it rather than waiting for automatic termination, which comes later.
Is a bigger down payment always better?
It lowers the payment and clears PMI, but the cash leaves your control. Money in a down payment is not available for an emergency, and it is not invested. The right size depends on your reserves and what else the cash would be doing.
Do these tax and insurance rates apply everywhere?
No, and they vary widely. Property tax runs from well under 1% to over 2% of value depending on the state, and insurance depends on the house, its age and its exposure to weather. These figures use the same assumptions as the rest of the site so the numbers stay consistent, but a real quote can differ a lot.
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