15 vs 30 Year Mortgage Calculator
Compare 15-year vs.
What this calculator does
The 15 vs 30 Year Mortgage Calculator estimates your result instantly from the values you enter, using standard mortgages formulas. Compare 15-year vs. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate for planning rather than financial advice.
About 15 vs 30 Year Mortgage Calculator
The 15 vs 30 Year Mortgage Calculator provides a direct side-by-side comparison between 15-year and 30-year fixed home loans, illustrating the trade-off between higher monthly payments and massive lifetime interest savings.
Formula & Mathematical Calculation
Payment Difference = Monthly Payment (15-Year) - Monthly Payment (30-Year)
Total Interest Saved = Total Interest (30-Year) - Total Interest (15-Year)
Calculation Example
$300,000 Loan ($60k Down): 30-Yr Fixed @ 6.5% = $1,896.20/mo ($382,633 Total Interest). 15-Yr Fixed @ 5.75% = $2,491.14/mo ($148,405 Total Interest). 15-Year loan costs +$594.94/mo but SAVES $234,228 in interest and builds equity twice as fast!
Key Benefits
- Direct side-by-side financial comparison of 15-year and 30-year mortgages
- Calculates exact monthly payment differences and interest savings
- Shows equity buildup timelines and break-even milestones
- Helps buyers choose between cash flow flexibility and rapid debt elimination
- 100% free comparison tool
How to Use this Calculator
-
Enter Loan Amount
Input total mortgage loan principal. -
Specify 15-Year & 30-Year Interest Rates
Enter quoted interest rates for both terms. -
Compare Side-by-Side
Click Calculate to view comprehensive comparison table and charts.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Rates and contributions are assumed to stay constant for the whole period unless the form asks for them separately.
- Results use standard financial formulas and ignore fees, penalties and promotional terms that are not entered above.
- Inflation, tax changes and market volatility are not modelled unless a field for them is provided.
- Amounts are unit-agnostic: results are returned in the same currency you enter.
What it does not cover
- 15 vs 30 Year Mortgage Calculator produces estimates for education and planning, not a quote, offer or professional advice.
- Real-world outcomes differ when fees, taxes, rounding rules or provider-specific terms apply.
- Local regulations and tax rules vary by country and change over time; verify current rules for your jurisdiction.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For decisions with lasting financial impact, confirm the numbers with a qualified professional.
Frequently Asked Questions
You May Also Need
Next step: browse the full Mortgages calculators or read the related guides for context before you decide.