Guide · Mortgage

How mortgage payments are calculated

Educational guide · Updated · About 8 min read

A fixed-rate mortgage payment spreads principal and interest over a set number of months. Nestfigure shows that principal-and-interest math clearly.

Steps

  1. Start with home price and down payment → loan amount.
  2. Convert annual rate to a monthly rate.
  3. Solve the fixed payment that pays the loan off over the term.
  4. Optional: add monthly tax, insurance, or HOA amounts you enter.

Sample

$400,000.00 · 20% down · 6.5% · 30 years → about $2,022.62 P&I/month. Open sample

Related

Frequently asked questions

How is a fixed mortgage payment calculated?

Loan amount = price − down payment. Monthly P&I uses the standard amortization formula with monthly rate = annual rate ÷ 12 and n = years × 12.

What is a sample payment on $400,000 with 20% down at 6.5% for 30 years?

About $2,022.62 principal and interest per month under Nestfigure’s model.

Related tool

Estimate a payment with free math

Price, down payment, rate, term—optional tax and insurance you type.

Open mortgage calculator

Sources linked above include U.S. government materials (for example CFPB, FDIC, NCUA, BLS, IRS) where noted. Sample math uses only labeled Nestfigure assumptions—not bank quotes, job offers, or personalized advice. Last reviewed: August 9, 2026.

YMYL notice: This site is for education only. It is not financial, tax, or investment advice. Nestfigure is not a bank, credit union, broker, investment adviser, or fiduciary. Product terms, rates, and penalties vary—always read your institution’s disclosures before acting. Calculator results are mathematical estimates, not bank quotes.