Fixed-Rate Mortgage Calculator
20-Year Mortgage Calculator
Estimate the monthly payment and total interest on a 20-year fixed mortgage. Include property taxes, homeowners insurance, PMI, HOA fees, and extra principal, then compare the loan with a 30-year term.
Last reviewed: September 1, 2026
20-Year Mortgage Calculator
Estimate a 20-year fixed mortgage payment and compare the payoff cost with a 30-year term.
20-Year Loan Details
Your 20-Year Mortgage Results
Includes principal, interest, estimated property taxes, homeowners insurance, HOA, PMI when applicable, and any extra monthly principal entered.
See If You Can Get Pre-Approved
You have an estimated mortgage result. Continue to pre-approval to explore mortgage options for your home-buying scenario.
Checking options does not change your calculator estimate. Loan availability, rates, and eligibility depend on lender and borrower qualifications.
Important 20-Year Mortgage Assumptions
Results are estimates for educational planning. The calculator assumes a fixed interest rate and scheduled monthly payments. Property taxes, homeowners insurance, HOA dues, PMI, lender fees, and actual mortgage rates can change. PMI is modeled as an estimate while the loan balance remains above 80% of the original home price and should not be treated as a lender-specific cancellation determination.
Compare Mortgage Rates
Compare Current 20-Year Mortgage Rates
Review current mortgage offers from participating lenders after estimating how a 20-year payment fits your budget.
What is a 20-year mortgage?
A 20-year fixed-rate mortgage is scheduled to repay the loan over 240 monthly payments. The interest rate stays fixed for the stated term, so the scheduled principal-and-interest payment remains the same unless the loan is modified, refinanced, or paid off early.
The term sits between the more common 15-year and 30-year options. Compared with a 30-year loan at the same rate and loan amount, a 20-year mortgage generally requires a higher monthly payment but repays principal faster and produces less total interest.
How the 20-year mortgage payment is calculated
The calculator first subtracts the down payment from the home price to estimate the starting loan amount. It then applies the standard fixed-rate amortization formula using the entered interest rate and a 240-month term.
M = P × [r(1 + r)^n] ÷ [(1 + r)^n − 1]
P is the loan principal, r is the monthly interest rate, and n is the number of monthly payments. For a 20-year mortgage, n is 240.
What is included in the monthly payment estimate?
The primary result combines scheduled principal and interest with the housing costs you choose to enter. That can include property taxes, homeowners insurance, HOA dues, and an estimated PMI amount when applicable.
Principal and interest
The fixed loan payment calculated from the loan amount, rate, and 20-year term.
Property taxes
An estimated monthly amount based on the annual property-tax figure entered.
Homeowners insurance
The annual insurance estimate divided into a monthly amount for planning.
PMI and HOA
Optional estimates for private mortgage insurance and homeowners-association dues when they apply.
20-year vs. 30-year mortgage
A shorter amortization term pays principal down more aggressively. That is why a 20-year mortgage normally has a higher scheduled principal-and-interest payment than a 30-year mortgage with the same loan amount and interest rate, while producing a lower lifetime interest total.
Actual market rates can differ by term. The calculator's comparison intentionally holds the rate constant so you can see the effect of changing only the amortization period.
Is a 20-year mortgage a good choice?
A 20-year term can be useful when you want to repay the mortgage faster than a 30-year schedule but prefer a lower required payment than a comparable 15-year loan. The tradeoff is reduced monthly cash-flow flexibility compared with choosing the longer term.
When comparing terms, consider the required payment, cash reserves, other debts, expected time in the home, interest-rate differences, and whether you prefer a lower contractual payment with optional extra principal or a shorter required repayment schedule.
How extra principal affects a 20-year mortgage
Extra principal reduces the outstanding balance sooner. Because future interest is calculated on the remaining balance, additional principal can reduce total interest and move the payoff date forward. It normally does not reduce the required scheduled payment unless the loan is recast, refinanced, or otherwise modified.
If accelerated payoff is your main goal, you can also use the Mortgage Extra Payments Calculator to compare recurring, annual, and one-time principal strategies in more detail.
Frequently asked questions
How many payments are in a 20-year mortgage?
A standard monthly 20-year mortgage has 240 scheduled monthly payments.
Is a 20-year mortgage cheaper than a 30-year mortgage?
At the same loan amount and interest rate, a 20-year mortgage generally produces less total interest because principal is repaid faster. The required monthly payment is typically higher.
Does a 20-year mortgage always have a lower rate than a 30-year mortgage?
No. Mortgage pricing changes over time and by lender, borrower, property, loan type, and market conditions. Compare actual offers rather than assuming a particular term will always have the lower rate.
Can I pay a 20-year mortgage off early?
Extra principal can shorten payoff when the loan allows it. Review the note and servicer instructions before making large additional payments or relying on a specific prepayment treatment.
Will PMI automatically disappear at 80% LTV?
Not necessarily. Conventional mortgage-insurance cancellation and termination rules depend on the loan and applicable requirements. The calculator uses an 80% balance-to-original-value threshold only as a planning estimate.
Should I choose a 20-year or 15-year mortgage?
A 15-year term typically requires a larger monthly payment and repays principal faster. A 20-year term can provide a middle ground between a 15-year and 30-year repayment schedule.
Methodology and related calculators
MortgagePaymentCalculator.io is published by Family Brands LLC. Calculator results are estimates for educational and planning purposes and are not mortgage offers, approvals, or lender quotes.