Transparent method
The formula
Worked example
Example inputs
How to interpret the result
The monthly payment alone tells you what fits a budget, while total interest tells you what the loan actually costs over its full life, and the two numbers can rank two loan offers in opposite directions. A longer term lowers the monthly payment while raising the lifetime interest, so judging affordability from the payment alone misses the real cost trade being made.
Before you rely on it
What to check
Look at both figures together, monthly payment for budget fit and total interest for real cost, rather than optimizing for one while ignoring the other.
The common error
Where people go wrong with loan payment calculator
Choosing a loan term based on the lowest monthly payment alone. Stretching the term to lower the payment raises the total interest paid over the life of the loan, sometimes substantially.
Sensitivity evidence
How annual interest rate changes the monthly payment
| Annual interest rate | Monthly payment | Total interest |
|---|---|---|
| 5.5% | $478 | $3,652 |
| 6.5% | $489 | $4,349 |
| 7.5%worked example | $501 | $5,057 |
| 8.5% | $513 | $5,775 |
| 9.5% | $525 | $6,503 |
Every input, tested
Which input moves the monthly payment most
| Input | Tested from | To | Monthly payment at each end | Swing |
|---|---|---|---|---|
| Loan term | 4.0 years | 6.0 years | $604 to $432 | $172 (34%) |
| Loan amount | $22,500 | $27,500 | $451 to $551 | $100 (20%) |
| Annual interest rate | 6.5% | 8.5% | $489 to $513 | $24 (4.7%) |
Two variables at once
Monthly payment by annual interest rate and loan amount
| Annual interest rate \ Loan amount | $20,000 | $25,000 | $30,000 |
|---|---|---|---|
| 5.5% | $382 | $478 | $573 |
| 6.5% | $391 | $489 | $587 |
| 7.5% | $401 | $501 | $601 |
| 8.5% | $410 | $513 | $615 |
| 9.5% | $420 | $525 | $630 |
Step by step
The worked example, input by input
| Input | Value used |
|---|---|
| Loan amount | $25,000 |
| Annual interest rate | 7.5% |
| Loan term | 5.0 years |
| Monthly payment | $501 |
| Total interest | $5,057 |
Complete evidence
Full amortization schedule
Show all 60 rows
| Payment | Opening balance | Principal | Interest | Ending balance |
|---|---|---|---|---|
| Payment 1 | $25,000 | $345 | $156 | $24,655 |
| Payment 2 | $24,655 | $347 | $154 | $24,308 |
| Payment 3 | $24,308 | $349 | $152 | $23,959 |
| Payment 4 | $23,959 | $351 | $150 | $23,608 |
| Payment 5 | $23,608 | $353 | $148 | $23,255 |
| Payment 6 | $23,255 | $356 | $145 | $22,899 |
| Payment 7 | $22,899 | $358 | $143 | $22,541 |
| Payment 8 | $22,541 | $360 | $141 | $22,181 |
| Payment 9 | $22,181 | $362 | $139 | $21,819 |
| Payment 10 | $21,819 | $365 | $136 | $21,454 |
| Payment 11 | $21,454 | $367 | $134 | $21,088 |
| Payment 12 | $21,088 | $369 | $132 | $20,718 |
| Payment 13 | $20,718 | $371 | $129 | $20,347 |
| Payment 14 | $20,347 | $374 | $127 | $19,973 |
| Payment 15 | $19,973 | $376 | $125 | $19,597 |
| Payment 16 | $19,597 | $378 | $122 | $19,219 |
| Payment 17 | $19,219 | $381 | $120 | $18,838 |
| Payment 18 | $18,838 | $383 | $118 | $18,455 |
| Payment 19 | $18,455 | $386 | $115 | $18,069 |
| Payment 20 | $18,069 | $388 | $113 | $17,681 |
| Payment 21 | $17,681 | $390 | $111 | $17,290 |
| Payment 22 | $17,290 | $393 | $108 | $16,898 |
| Payment 23 | $16,898 | $395 | $106 | $16,502 |
| Payment 24 | $16,502 | $398 | $103 | $16,104 |
| Payment 25 | $16,104 | $400 | $101 | $15,704 |
| Payment 26 | $15,704 | $403 | $98 | $15,301 |
| Payment 27 | $15,301 | $405 | $96 | $14,896 |
| Payment 28 | $14,896 | $408 | $93 | $14,488 |
| Payment 29 | $14,488 | $410 | $91 | $14,078 |
| Payment 30 | $14,078 | $413 | $88 | $13,665 |
| Payment 31 | $13,665 | $416 | $85 | $13,249 |
| Payment 32 | $13,249 | $418 | $83 | $12,831 |
| Payment 33 | $12,831 | $421 | $80 | $12,410 |
| Payment 34 | $12,410 | $423 | $78 | $11,987 |
| Payment 35 | $11,987 | $426 | $75 | $11,561 |
| Payment 36 | $11,561 | $429 | $72 | $11,132 |
| Payment 37 | $11,132 | $431 | $70 | $10,701 |
| Payment 38 | $10,701 | $434 | $67 | $10,267 |
| Payment 39 | $10,267 | $437 | $64 | $9,830 |
| Payment 40 | $9,830 | $440 | $61 | $9,391 |
| Payment 41 | $9,391 | $442 | $59 | $8,948 |
| Payment 42 | $8,948 | $445 | $56 | $8,503 |
| Payment 43 | $8,503 | $448 | $53 | $8,055 |
| Payment 44 | $8,055 | $451 | $50 | $7,605 |
| Payment 45 | $7,605 | $453 | $48 | $7,151 |
| Payment 46 | $7,151 | $456 | $45 | $6,695 |
| Payment 47 | $6,695 | $459 | $42 | $6,236 |
| Payment 48 | $6,236 | $462 | $39 | $5,774 |
| Payment 49 | $5,774 | $465 | $36 | $5,309 |
| Payment 50 | $5,309 | $468 | $33 | $4,842 |
| Payment 51 | $4,842 | $471 | $30 | $4,371 |
| Payment 52 | $4,371 | $474 | $27 | $3,897 |
| Payment 53 | $3,897 | $477 | $24 | $3,421 |
| Payment 54 | $3,421 | $480 | $21 | $2,941 |
| Payment 55 | $2,941 | $483 | $18 | $2,458 |
| Payment 56 | $2,458 | $486 | $15 | $1,973 |
| Payment 57 | $1,973 | $489 | $12 | $1,484 |
| Payment 58 | $1,484 | $492 | $9.28 | $993 |
| Payment 59 | $993 | $495 | $6.20 | $498 |
| Payment 60 | $498 | $498 | $3.11 | $0.00 |
Where the inputs come from
The loan amount is the figure on the promissory note or the lender's offer sheet under "amount financed", not the price of what you are buying. If a fee is rolled into the balance, include it, because you pay interest on it. The rate must be the note rate, not the APR that also counts fees. Term is the number of years on the contract; a 60-month loan is 5.
People often type the sticker price of a car or the credit limit they were approved for, and the payment that comes back describes a loan they will never take.
When the result stops applying
The math assumes equal monthly payments, one rate for the whole term and no fees folded in. Variable-rate loans, interest-only periods, skipped payments, late fees and daily-interest lenders that credit payments on the day they arrive all move the real figure. If a loan starts with a promotional rate, this result is wrong from the month the rate resets.
What to compare it with
Before signing, get the same loan quoted by a bank, a credit union and an online lender on the same day, since rates for the same borrower often differ by a point or more. Then run the offers through the loan comparison calculator and the APR calculator so fees do not hide in the paperwork. If the payment looks tight, shorten the amount you borrow before lengthening the term.
A quote that changes the moment you mention a co-signer or collateral usually means the lender priced your credit, not the product, and it is worth asking what improves it.
Worked examples for the Loan Payment Calculator
6 real questions people ask, each worked through with this calculator at its own numbers.
What is the monthly payment on a $250,000 mortgage at 6.5% over 30 years?
| Loan amount | $250,000 |
|---|---|
| Annual interest rate | 6.5% |
| Loan term | 30.0 years |
| Monthly payment | $1,580 |
A quarter of a million is roughly where first-time buying starts in a lot of the country, and 6.5% is an ordinary rate instead of a good or a bad one. The payment below is principal and interest only. Property tax, homeowners insurance and any mortgage insurance sit on top, collected monthly through escrow, and together they routinely add a few hundred dollars.
Take the figure below as the floor, not the payment. Ask a lender for a full payment estimate with taxes and insurance before deciding what you can carry.
The trap at this size is the down payment. A buyer with less than twenty percent down usually pays private mortgage insurance, which is charged monthly on top of the figure here and falls away only once the balance drops far enough. Another is closing costs, which are a separate cash bill at signing and are not part of the loan. First-time buyers often plan for the deposit and forget both, then discover the monthly number they budgeted for is the smallest of the costs.
Ask two lenders for a Loan Estimate on the same day. The form breaks out the rate, the fees and the estimated monthly total in a standard layout, so the two can be compared line by line instead of by the headline rate.
What is the monthly payment on a $300,000 mortgage at 6.5% over 30 years?
| Loan amount | $300,000 |
|---|---|
| Annual interest rate | 6.5% |
| Loan term | 30.0 years |
| Monthly payment | $1,896 |
Fifty thousand more borrowed at the same rate, same term. Worth looking at what that actually buys in monthly terms, because the jump is smaller than most people guess and the extra interest over thirty years is much larger than they guess. Both facts matter and they point in opposite directions.
Compare the monthly difference against the total-interest difference before stretching for a higher price. One is a few hundred a month and the other is six figures.
People compare loan sizes by the monthly payment and forget the total. Borrowing more at the same rate moves the payment by a modest amount, while the interest paid across thirty years moves by a much larger one, because interest is charged on a bigger balance for longer. There is also a threshold effect. Cross a certain price and the insurance, the tax bill and the required reserves all step up together, so the true monthly cost climbs faster than the loan does.
Run the same loan at the previous size and at the next size up, then compare total interest, not only the payment. If the extra house adds far more in interest than the difference in monthly cost suggests, that is the number to weigh.
What is the monthly payment on a $350,000 mortgage at 6.5% over 30 years?
| Loan amount | $350,000 |
|---|---|
| Annual interest rate | 6.5% |
| Loan term | 30.0 years |
| Monthly payment | $2,212 |
At this size the loan is usually the largest financial commitment a household has ever made, and it is made on a rate nobody controls. The arithmetic is fixed once you sign. What is not fixed is the tax bill, the insurance premium and the maintenance, all of which rise over thirty years while the principal-and-interest payment does not.
Budget for the payment plus the things that grow around it. A fixed mortgage payment is not a fixed cost of ownership.
A larger loan makes the rate quote matter more. A quarter-point difference on this balance is worth thousands over the life of the loan, so the choice between paying points and taking the higher rate stops being trivial. Points are prepaid interest. They only pay off if you keep the loan long enough to recover their cost through the lower payment, and many people sell or refinance before that happens.
Work out the break-even in months: the cost of the points divided by the monthly saving they buy. If you cannot say honestly that you will keep this loan past that date, skip the points.
What is the monthly payment on a $400,000 mortgage at 7% over 30 years?
| Loan amount | $400,000 |
|---|---|
| Annual interest rate | 7.0% |
| Loan term | 30.0 years |
| Monthly payment | $2,661 |
Seven percent changes the shape of this loan. At that rate, the first years are almost entirely interest, and equity builds slowly enough that a sale within a few years can leave very little after costs. That is not an argument against buying. It is an argument for knowing how long you intend to stay before you commit.
Run the amortization schedule and look at the balance after five years. If a move inside that window is likely, the maths is different.
At seven percent the pull toward an adjustable-rate loan gets stronger, because the starting rate is lower. The catch is the reset. An adjustable loan can rise after the fixed period ends, and the payment on that day is set by the market then, not by the rate you signed. A buyer who chooses it to fit today's budget is betting on a future rate and a future income at once.
Ask the lender for the worst-case payment after the first adjustment, using the loan's stated caps. If that figure would break your budget, the low starting rate is not a saving, it is a deferred cost.
What is the monthly payment on a $500,000 mortgage at 6% over 30 years?
| Loan amount | $500,000 |
|---|---|
| Annual interest rate | 6.0% |
| Loan term | 30.0 years |
| Monthly payment | $2,998 |
Half a million at six percent. In higher-cost markets this is an ordinary loan , not a large one, and the deposit behind it is usually substantial. Where buyers get caught at this level is the gap between what a lender will approve and what leaves room to save, because approval is calculated on gross income before anything real comes out.
A lender's maximum is a limit, not a recommendation. Work backward from what you want left over each month instead.
Above the conforming loan limit in many areas, a loan is treated as jumbo and priced and underwritten differently. That can mean larger reserve requirements, a bigger required down payment and stricter income documentation. Whether this balance crosses that line depends on the county, and the limit changes most years. Buyers who assume the ordinary rules apply sometimes find out late in the process.
Look up the current conforming limit for the county where the home sits before comparing rates. If the loan is under it, the rate sheet is different from the one a jumbo loan would use.
What is the monthly payment on a $200,000 mortgage at 6.5% over 15 years?
| Loan amount | $200,000 |
|---|---|
| Annual interest rate | 6.5% |
| Loan term | 15.0 years |
| Monthly payment | $1,742 |
Fifteen years instead of thirty is the single biggest lever on total interest available to a borrower, and it barely gets discussed because the monthly payment goes up. Half the term does not mean double the payment. It means substantially less than double, and dramatically less interest. The trade is flexibility. A shorter term commits you to the higher payment every month, whatever else happens.
Compare total interest across both terms. Then ask whether you would still be comfortable with the higher payment in a bad year.
The higher payment is a fixed obligation, and that is the real cost of the shorter term. In a year when income drops, a thirty-year loan lets you stay current on a lower bill, while a fifteen-year loan does not. Some buyers get most of the benefit differently: they take the thirty-year loan and pay extra toward principal when they can, keeping the choice to stop.
Compare the fifteen-year payment against a thirty-year loan plus a fixed extra payment that matches it. The second route gives you the same speed with a lower required payment, at the price of a slightly higher rate.
People also ask
Frequently asked questions
Why is the payment higher on the lender's paperwork than on this page?
Usually a fee was added to the balance, or insurance and other add-ons were financed with the loan. Enter the amount financed as printed on the contract and compare again.
Does a longer term ever save money?
Only if the freed-up cash is used well, for example to clear higher-rate debt. On the loan itself a longer term always costs more interest, because the balance stays outstanding longer.
Is monthly interest calculated on the original amount?
No. On an amortizing loan each month's interest is charged on the balance still owed, so early payments are mostly interest and later ones mostly principal.