20 vs. 30 Year Mortgage
Compare a 20-year and a 30-year mortgage to weigh a higher payment against long-term interest savings.
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How the 20 vs. 30 year mortgage calculator works
A 20-year mortgage sits between the aggressive 15-year and the flexible 30-year, and it is an underused middle ground. Against a 30-year loan on the same amount, the 20-year raises your monthly payment by a moderate amount — far less of a jump than the 15-year demands — while still cutting total interest meaningfully and freeing you of the debt a full decade sooner.
For borrowers who want to pay down faster without the strain of a 15-year payment, the 20-year is often the sweet spot. This calculator compares both so the modest payment increase and the interest saved are clear.
Worked example: with loan amount of $300,000, 20-year rate of 6.88% and 30-year rate of 7.18%, the 20 vs. 30 year mortgage shows interest saved with the 20-year of $178,589.
- 20-year payment
- $2,304.34
- 20-year total interest
- $253,041
- 30-year payment
- $2,032.30
- 30-year total interest
- $431,630
The formula
Both loans amortize the same principal with the standard payment formula, differing in term (240 versus 360 months) and possibly rate. Total interest is the monthly payment times the count of payments minus the principal. The 20-year's higher payment buys a shorter payoff and lower lifetime interest.
How every calculator here computes, what it assumes and how the defaults stay current: our methodology.
- The comparison holds the loan amount constant and varies only the term and any rate difference.
- Rates can be set equal or with a small 20-year discount; the gap between 20- and 30-year rates is usually narrow.
- Interest totals assume each loan runs to maturity with no additional principal payments applied.
- Property taxes, insurance, and any mortgage insurance are left out, as they affect both terms alike.
- The model does not weigh what you might earn investing the payment difference instead of accelerating payoff.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender or a licensed advisor.
Questions about the 20 vs. 30 year mortgage calculator
Why pick a 20-year over the more common 15- or 30-year?
Balance. The 20-year cuts a meaningful slice of interest and shortens your payoff by ten years versus a 30-year, but its monthly payment is far gentler than a 15-year's.
Borrowers who find the 15-year payment uncomfortable yet dislike paying interest for three decades often land here. It is the compromise term — less strain than 15, less cost than 30.
How does the 20-year payment compare to a 30-year?
The increase is moderate, typically a manageable step up rather than the steep climb a 15-year requires.
You are spreading the same principal over 240 payments instead of 360, so each installment rises, but the difference is usually small enough that many budgets absorb it. In exchange you finish a decade early and shed a substantial amount of interest.
Are 20-year mortgage rates lower than 30-year rates?
Often slightly, though the discount is usually smaller than the gap you would see on a 15-year loan.
Shorter terms carry less risk for lenders, which can shave the rate, but 20-year pricing is not always advertised as prominently and varies by lender.
Ask specifically for a 20-year quote; some lenders default to showing 15 and 30 and omit it entirely.
Is my information saved or shared?
No. Every calculation runs entirely in your browser. We never store, transmit or sell the numbers you enter.
Is a 20-year mortgage worth it over a 30-year?
A 20-year gets you a lower rate and much less total interest than a 30-year, for a payment that is higher but far gentler than a 15-year.
It is a middle path for paying off sooner without straining cash flow — compare the two above.
Sources
- Freddie Mac — Primary Mortgage Market Survey (weekly average rates)
- CFPB — Loan Estimate explainer
- CFPB — Fixed-rate vs adjustable-rate mortgages
How the figures on this site are calculated and tested: methodology · editorial policy.
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