Example 1
- Amount: 400,000
- Rate: 7%
- Term: 25 years
Payment 2,827.12
Total 848,133.37
Interest 448,133.37
A classic scenario: at 7% over 25 years, interest ends up exceeding the amount borrowed.
Mortgage calculator
The calculator uses the numbers you enter: the loan amount, or price and down payment, the yearly rate, and the term in years. At 400,000, 7%, and 25 years the payment is 2,827.12. The schedule total is 848,133.37, and interest is 448,133.37. A 500,000 price with 100,000 down is a 400,000 loan and 80% LTV. English opens United States fields. Polish opens Polish fields.
English uses a United States mortgage set (PMI, points, APR, ARM, biweekly). Polish uses a Polish set (WIBOR or WIRON plus margin, commission, declining payments, PCC). Full table: amortization schedule. This is an estimate, not a lender review.
Result
Loan amount or price and down payment, rate, and term. Payment type: annuity or declining. The result shows up here.
How results are calculated
Amount400,000
Rate7%
Years25
Payment2,827.12
Interest448,133.37
The mortgage calculator builds a fixed installment, an annuity, from amount, annual rate, and term in years. At 400,000, 7%, and 25 years the payment is 2,827.12. The schedule total is 848,133.37, and interest is 448,133.37. If you enter property price and down payment, the calculator derives the loan and LTV. 500,000 minus 100,000 is a 400,000 loan and 80% LTV.
Annual property tax, annual home insurance, and monthly HOA stack onto housing cost outside the contractual payment. At a 500,000 price, a 100,000 down payment, 6.5%, and 30 years the payment is 2,528.27, and housing with tax 6,000, insurance 2,400, and HOA 250 is 3,478.27. That is an estimate, not a capacity review and not a credit decision.
Required fields when the loan is known are loan amount, annual interest rate, and term in years. You can leave price and down payment blank if you already know the loan. A monthly extra payment goes to principal above the installment and shows savings versus the base case. The first payment date sets a payoff date. The calculator does not ask for a score, a minimum down payment from an offer, or mortgage insurance.
At 250,000, 8%, and 20 years, an extra 300 a month leaves the payment at 2,091.10, shortens the term by 60 months, and saves 72,147.60 of interest. The full table with a yearly or one-time extra lives on the amortization schedule. A down-payment percent lives on the down payment page. Bare LTV from a known loan lives on the LTV page.
Header currency only labels the amounts. A comma and a period in 6.5 mean the same rate. The calculator waits for an amount, or for price plus down payment, plus rate and term. English uses United States fields: PMI, points, origination, and APR from the fees you entered. Polish uses Polish fields: index plus margin, commission, declining payments, and a 2% PCC model. This is still a model, not a lender review.
How to use
- Enter the loan amount, for example 400,000, or enter property price and down payment so the calculator can derive the loan and LTV.
- Enter the annual interest rate, for example 7, and the term in years, for example 25.
- Optionally add housing costs, an extra payment, and whether extras shorten the term or lower later payments. English also has PMI, points, and one extra P+I per year spread across months. Polish has index plus margin, commission, and PCC.
- Click Calculate. At 400,000, 7%, and 25 years the payment is 2,827.12, the total 848,133.37, interest 448,133.37.
- For the full table, open the amortization schedule. An income-based cap lives on borrowing capacity, not here.
Mortgage payment and LTV from price and down
Principal-plus-interest annuity, optional LTV. At 400,000, 7%, and 25 years the payment is 2,827.12 and the total is 848,133.37. Price 500,000 and down 100,000 is 80% LTV.
- payment
- Fixed principal plus interest. 400,000 at 7% for 25 years is 2,827.12. Interest 448,133.37 exceeds the amount borrowed.
- LTV
- Loan to value from price and down payment in this calculator. 400,000 financed on a 500,000 price with 100,000 down is 80%. Not APR.
- Down payment
- Cash subtracted from price to get the loan and LTV. 100,000 of 500,000 leaves 400,000 financed and 80% LTV.
- PMI
- Private mortgage insurance from the annual percent you enter, typically when LTV is above 80%. The model can stop it at 78% of the original price.
- APR
- Effective annual rate from the fees you entered, not a lender APR from a Loan Estimate.
How term length changes interest
The table uses 400,000 at 7% with monthly payments. Only the term changes. A longer term lowers the payment and raises total interest. This is not a loan offer.
| Term | Payment | Total interest |
|---|---|---|
| 15 years | 3,595.31 | 247,156.90 |
| 20 years | 3,101.20 | 344,285.77 |
| 25 years | 2,827.12 | 448,133.37 |
| 30 years | 2,661.21 | 558,035.91 |
Usage examples
Example 2
- Price 500,000, down 100,000 (LTV 80%)
- 6.5%, 30 years
- Tax 6,000/yr, insurance 2,400/yr, HOA 250/mo.
Payment 2,528.27
Housing 3,478.27
LTV 80%
The mortgage payment alone is not the full budget. Tax, insurance, and HOA raise the monthly cost to 3,478.27.
Example 3
- Amount: 250,000
- 8%, 20 years, start Jan 1, 2026
- Extra +300/mo.
Payment 2,091.10
Interest saved 72,147.60
60 months sooner
The extra 300 does not cut the contractual payment when you keep shorten-the-term. It shortens the term by 60 months and saves 72,147.60 of interest.
Example 4
- 250,000
- 6.5%
- 20 years
Payment 1,863.93
What is the monthly payment on 250,000 at 6.5% over 20 years? Payment 1,863.93.
Example 5
- 180,000
- 5.5%
- 15 years
Payment 1,470.75
What is the monthly payment on 180,000 at 5.5% over 15 years? Payment 1,470.75.
What the result is not
- This is not a credit score and not a minimum down payment from an offer. PMI on this page is the annual percent you enter, not a lender quote.
- Principal plus interest is not the full housing cost when you add tax, insurance, or HOA.
- An income-based cap lives on borrowing capacity. A cash loan without a property lives on the loan payment calculator.
Related calculators
Frequently asked questions
What is the payment on 400,000 at 7% for 25 years?
2,827.12 a month. The schedule total is 848,133.37 and interest is 448,133.37. That is a fixed annuity payment at a fixed rate, not a credit decision.
What LTV do I get at a 500,000 price and a 100,000 down payment?
The loan is 400,000, LTV 80%. LTV is the loan divided by the property value. At 6.5% for 30 years the payment is 2,528.27.
Where does housing cost of 3,478.27 come from?
Payment 2,528.27 plus 6,000/12 tax, 2,400/12 insurance, and 250 HOA. 2,528.27 + 500 + 200 + 250 = 3,478.27.
Does an extra 300 reduce the 2,091.10 payment?
No. The extra goes to principal above the contractual payment. At 250,000, 8%, and 20 years, an extra 300 a month leaves the payment at 2,091.10, shortens the term by 60 months, and saves 72,147.60 of interest.
Is this a full lender review?
No. There is no score and no offer minimum down payment. PMI is the annual percent you enter, not a lender quote. The calculator reports payment, LTV, and optional housing cost.
Where is the down-payment percent?
On the down payment page. Here you enter a loan amount, or a price and a cash down payment, not a percent slider.
Where is the full table of 300 payments?
On the amortization schedule. Here you see payment, total, interest, LTV, and housing cost.
Do 6.5 and 6,5 count as the same rate?
Yes. 6,5 and 6.5 are the same rate. Header currency only labels the result.
How is this different from the cash-loan payment page?
Same annuity math. Here you also get price, down payment, LTV, and housing costs. The cash-loan calculator stays with shorter amounts and optional fees.
Is 2,827.12 a credit decision?
No. It is a fixed-rate estimate from the numbers you enter. An offer and a capacity review are computed by a lender.
Knowledge sources
The annuity payment uses the rate you enter, plus optional housing cost. This is an estimate, not a lender review.
Page updated September 25, 2026.