Legacy Investing CalculatorsShow

Mortgage payment

What are the monthly payment and total interest?

Your numbers

$

Principal after down payment

%
yrs

Monthly payment

$2,275.44

Total paid$819,160
Total interest$459,160
Payments360 months

Tip. Add tax, insurance, and maintenance on top before judging whether the payment is affordable.

Assumptions

  • Fixed-rate, fully amortizing loan with monthly payments.
  • Excludes taxes, insurance, HOA, PMI, and closing costs.

Sources

  • Freddie Mac Primary Mortgage Market Survey, mid-2026

Explore the numbers

Examples and charts

Start with a scenario, then read the response curve to see which input actually moves the answer.

Example 1

A 30-year home loan

Common starter case: $400k principal, 6.5% rate, 30 years.

Monthly payment

$2,528.27

Example 2

15-year term

Same principal and rate with a shorter term to compare payment vs interest.

Monthly payment

$3,484.43

Example 3

Rate 1 point higher

Shows how a 7.5% rate changes payment and total interest.

Monthly payment

$2,796.86

Sweeps annual interest rate from half to one and a half times your value, holding everything else fixed.

Response curve

How annual interest rate moves the result

Monthly payment

$2,275.44

$1.6k$1.8k$2.0k$2.2k$2.4k$2.6k$2.8k$3.0k$3.2k4.0%6.0%8.0%
Chart axis: Annual interest rateNow 6.5%$2.3k

Timeline

Balance falling as interest accumulates
$0$100k$200k$300k$400kStartY15Y30
  • Remaining balance
  • Interest paid

What this calculates

Estimates principal and interest for a fixed-rate amortizing mortgage. Taxes, insurance, HOA, and PMI are left out on purpose so you can see the loan math clearly.

How to use it

  1. Start with loan amount and work down the form, or load an example to begin from a realistic case.
  2. Read the headline result alongside the supporting rows, which show the intermediate figures behind it.
  3. Check the assumptions. They decide what the number includes and, more importantly, what it leaves out.
  4. Sweep annual interest rate on the response curve to see how much it actually moves the answer.
  5. Run a cautious case as well as an optimistic one before using the estimate in a decision.

Common mistakes

  • Comparing a principal-and-interest figure to a rent number that includes everything.
  • Forgetting mortgage insurance when the down payment is under 20%.
  • Budgeting to the maximum payment a lender approves rather than one that leaves room to save.

Formula

M = P · r(1+r)ⁿ / ((1+r)ⁿ − 1), where r = annual rate ÷ 12 and n = years · 12. Loan amount P is the principal you enter.

Inputs

  • Loan amount. Principal after down payment
  • Annual interest rate (%)
  • Term (yrs)

FAQ

Is this my full housing payment?

Usually not. Most payments also escrow property tax and insurance, and often mortgage insurance or HOA dues. Those commonly add 20 to 30% on top of principal and interest.

What principal should I enter?

The purchase price minus your down payment, plus anything you roll into the loan such as financed closing costs.

Why does a small rate change move the payment so much?

Because the rate applies to the entire balance for thirty years. On a $400,000 loan, one percentage point is roughly $260 a month and close to $95,000 over the full term.

Is a 15-year mortgage worth the higher payment?

It usually cuts total interest by more than half and often carries a lower rate. The trade is a much larger required payment, with far less flexibility if your income drops.

How much is a mortgage payment on a $300,000 house?

On a 30-year loan at about 6.5%, principal and interest on $300,000 is roughly $1,900 a month. Property tax, insurance, and HOA dues add several hundred more.

What does PITI stand for?

Principal, interest, taxes, and insurance: the four parts of a full mortgage payment. This calculator shows the principal and interest portion, and you add your own escrow estimate for the rest.

How much house can I afford on my income?

A common guideline keeps housing costs under about 28 to 31% of gross income and total debt under about 43%. Lenders also weigh your credit score, down payment, and other debts.

Are these numbers financial advice?

No. They are educational estimates based on the inputs and assumptions on this page. Confirm important decisions with a qualified professional and your own documents.

Read the full guideMortgage payment: principal, interest, taxes, insurance

The questions people usually ask next.