Mortgage Calculator US — Estimate Your Monthly Payment

Where does your payment actually go?

Ask most people what their mortgage payment covers and they'll say principal and interest. That's only part of it.

Whether you call it a mortgage calculator, a home loan calculator, or just your monthly mortgage payment, your lender folds five things into one monthly charge — principal, interest, taxes, insurance, and for a lot of buyers, PMI or HOA dues on top. The industry shorthand for the first four is PITI, but the acronym matters less than knowing where your money is actually going.

Principal is the slice that chips away at what you actually owe on the house. Interest is the cost of borrowing the money in the first place, charged as a percentage of whatever balance is left.

Here's the part that catches a lot of first-time buyers off guard: in the early years of a 30-year loan, most of your payment is interest, not principal — you're barely making a dent in the balance for a while. Watch the year-by-year table above and you'll see that split flip the other way over time. That shift is called amortization.

Property taxes get billed by your county, not your lender, but most lenders collect a piece of it every month anyway and hold it in an escrow account, so you're not hit with one massive bill once or twice a year. Home insurance works the same way — every lender requires it, and it's usually escrowed too.

Then there's PMI, which only shows up if you put down less than 20% on a conventional loan. Worth being blunt about this one: PMI protects the bank, not you — the Consumer Financial Protection Bureau has a good plain-English explainer if you want the full rundown.

The upside is it doesn't last forever — once your balance drops to 78% of what the home was originally worth, your lender is legally required to drop it, no request needed.

How your down payment moves the needle

A bigger down payment does double duty. It shrinks your loan amount, which lowers your principal and interest right away, and once you cross that 20% line, PMI disappears entirely.

Put $80,000 down on a $400,000 home instead of $40,000, and depending on your rate, you're often looking at $150 to $250 less every single month — part from the smaller loan, part from skipping PMI altogether. Over 30 years, that gap adds up to real money.

15-year vs 30-year: which one actually makes sense

This is one of those choices that looks simple until you run the actual numbers — which is exactly why the calculator above lets you flip the term and watch everything shift in real time. On a $320,000 loan at 6.6%, here's the honest comparison:

A real example, worked out

Say you've found a $400,000 house, you've saved up $80,000 for a 20% down payment, and your lender quotes you 6.6% on a standard 30-year fixed loan. Your loan amount is $320,000.

Run that through the math and principal and interest land around $2,044 a month. Tack on roughly $367 for property tax and $167 for insurance, and you're at about $2,577 total — no PMI, since you cleared that 20% mark. Change any of those numbers in the calculator above and watch your own figures move in real time.

How to use this mortgage calculator

You don't need every number exactly right to get something useful out of this. Here's the order that makes sense:

Hit calculate and this mortgage calculator updates the breakdown instantly — no page reload, nothing sent to a server. The amortization table further up shows exactly how your balance shrinks year by year, which is worth a look if you're weighing whether to pay extra toward principal.

What actually moves your mortgage rate

Two people buying identical houses can end up with noticeably different monthly payments, and it usually comes down to a handful of things lenders weigh when they price your rate:

Credit score does more heavy lifting than most buyers realize. The gap between a 620 and a 760 credit score can be the difference of half a percentage point or more on your rate — on a $320,000 loan, that's easily $100+ a month.

Loan type matters too. Conventional, FHA, VA and USDA loans all price differently, and each comes with its own down payment minimums and insurance rules. If you're a veteran, it's worth running the numbers through our VA loan calculator separately, since VA loans skip PMI entirely.

Where you're buying changes two line items directly: property tax rates vary enormously by state and county, and so does the cost of homeowners insurance — Florida and coastal areas run dramatically higher than, say, the Midwest.

Loan term and points are the two levers you control most directly. A shorter term means a higher payment but a much lower rate and total interest bill. Buying discount points upfront can lower your rate further if you're planning to stay in the home a long time.

PMI, explained a bit further

Private Mortgage Insurance shows up whenever a conventional down payment falls under 20%, and it's worth understanding why lenders require it rather than just accepting it as a fixed cost. PMI exists purely to protect the lender if you default — it does nothing for you directly, which is exactly why removing it as soon as legally possible is almost always worth pursuing.

Lenders are required to automatically cancel PMI once your loan balance drops to 78% of the home's original value, based on your original amortization schedule, not a new appraisal.

You can also request removal yourself once you hit 80%, which sometimes happens sooner than the automatic cancellation if you've made extra payments or the home has appreciated. Some lenders require a new appraisal to confirm current value if you're requesting early removal based on appreciation rather than paydown alone.

PMI rates themselves vary based on your credit score and down payment size — a borrower with excellent credit putting down 15% typically pays a noticeably lower PMI rate than one with a borderline score putting down 5%, even on identical loan amounts. This is one more reason a strong credit score pays off in ways beyond just the base interest rate.

Understanding your escrow account

Most mortgage payments this calculator estimates get split by your loan servicer into two buckets: the portion that goes to your lender for principal and interest, and the portion that goes into an escrow account to cover property tax and insurance bills as they come due.

You're not paying your county or your insurer directly each month — your servicer collects the money and pays those bills on your behalf when they're actually due.

This is convenient, but it also means your monthly payment can change even when your rate doesn't. If your property tax bill or insurance premium rises year over year, which is common, your servicer adjusts your monthly escrow contribution to cover the higher bill, and your total payment increases even though your principal and interest portion stayed exactly the same.

Lenders typically require a small cushion in escrow, often two months' worth of payments, as a buffer against exactly this kind of increase. This cushion is part of why your initial cash-to-close and your first year of payments can look slightly different from the pure calculator estimate here, which focuses on principal, interest, tax and insurance without modeling the cushion specifically.

This calculator vs an actual pre-approval

It's worth being direct about what this tool is and isn't. This mortgage calculator gives you a fast, private estimate based on numbers you control. A pre-approval is a formal process where a lender actually verifies your income, assets, debts and credit, and issues a specific dollar figure in writing that carries real weight with sellers.

Both have their place. Use this calculator early, while you're still figuring out your price range and comparing scenarios, since it's instant and doesn't require sharing any personal information. Move to an actual pre-approval once you're seriously ready to start touring homes and making offers, since sellers in any competitive market expect to see a real pre-approval letter attached to a serious offer, not just a calculator screenshot.

Where your down payment can legitimately come from

Lenders care not just about how much down payment you have, but where it came from, and they'll typically want to see a paper trail. Savings you've built up over time are the most straightforward source and usually require the least extra documentation beyond recent bank statements.

Gift funds from family members are widely accepted on most loan programs, though they typically require a signed gift letter confirming the money doesn't need to be repaid, plus evidence of the transfer between accounts. Retirement account withdrawals are technically usable too, though it's worth weighing the tax implications and lost future growth against the benefit of a larger down payment before going this route.

What lenders generally don't want to see is a sudden, unexplained large deposit right before applying — this tends to trigger extra scrutiny and documentation requests during underwriting, since it could represent an undisclosed loan that would affect your real debt-to-income picture.

If you're receiving a gift or moving money between accounts, doing it a few months before applying, rather than the week before, tends to make the underwriting process smoother.

Locking your rate once you're ready

Once you've settled on a lender and are moving toward closing, you'll typically have the option to lock your interest rate for a set window — commonly 30, 45 or 60 days — protecting you from market rate movement while your loan processes. A shorter lock is often slightly cheaper but only makes sense if you're confident your closing will happen quickly.

If your closing timeline is uncertain, or you're buying new construction with a longer build schedule, a longer lock, even at a modest additional cost, can be worth it to avoid the risk of your rate expiring before closing and needing an extension or a re-lock at a potentially less favorable rate.

Keeping this calculator handy after you close

This calculator isn't just for shopping — it's worth bookmarking and returning to periodically after you own the home. Rates move, your credit can improve, and your home's value can shift, all of which affect whether refinancing makes sense down the line.

A rough rule of thumb some lenders mention is that a rate drop of half a percentage point or more can be worth exploring, though the real answer depends on your specific closing costs and how long you plan to stay. Running your current numbers back through a refinance calculator once a year or so is a low-effort habit that occasionally uncovers real savings.

Getting the best rate on your mortgage calculator numbers

The rate you plug into this mortgage calculator has an outsized effect on your monthly number, which is exactly why shopping multiple lenders matters as much as it does. Two lenders quoting the same borrower can land noticeably apart on rate and fees, purely based on how each prices risk and overhead that particular week.

Getting real Loan Estimates from at least two or three lenders, ideally within the same day or two so market movement doesn't skew the comparison, remains one of the few genuinely free ways to lower what this calculator ultimately shows as your monthly payment. Our loan comparison calculator makes this side-by-side check quick.

Why your payment can change even on a fixed-rate loan

A fixed-rate mortgage locks your principal and interest permanently, but the total monthly number this calculator shows isn't entirely frozen. Property taxes and homeowners insurance, both escrowed into your payment, can rise from year to year as your local tax assessment or insurance premium changes.

This is normal and expected — it's not a sign anything went wrong with your loan. Lenders typically conduct an annual escrow analysis and adjust your payment to reflect updated tax and insurance costs, which is why a mortgage payment quoted at closing can look slightly different a year or two later even though the loan itself never changed.

Getting PMI removed once you qualify

If your down payment started under 20%, you don't have to wait for PMI to cancel automatically at 78% loan-to-value — you can request removal once you hit 80%, provided your payment history is current and, depending on your lender, a new appraisal confirms the value supports it.

Home value appreciation can get you there faster than paydown alone in a rising market, which is worth checking periodically rather than assuming PMI removal only happens on the original amortization schedule's timeline.