01 Loan size
One principal amount amortized under all three terms. Principal & interest only — taxes, insurance, PMI and fees are not included.
$
$
Principal$0.00
Loan-to-value—
02 Annual fixed rates
One annual rate per term, editable. Shorter terms normally price below the 30-year — the rack flags any upside-down spread.
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%
%
03 Head-to-head
Full-life totals for each term. The 30-year column is the baseline everything is measured against.
| Metric | 15-year | 20-year | 30-year |
|---|---|---|---|
| Annual rate | — 180 months |
— 240 months |
— 360 months |
| Monthly payment (P&I) | — | — | — |
| Total payments | — | — | — |
| Total interest paid | — | — | — |
| Interest as share of loan | — | — | — |
| Extra vs 30-year (monthly) | — | — | — |
| Total interest saved vs 30-year | — | — | — |
04 The true-cost trade-off
Payments are only half the story. The question is what a shorter term's extra monthly dollars buy in avoided interest — and whether you must commit to the shorter note to capture it.
15-year vs 30-yearbaseline
Extra payment vs 30-year—
Total interest saved—
Per extra $1/mo · interest avoided—
Pay-off with the 15-yr payment...on the 30-year note—
Effective interest that route—
20-year vs 30-yearbaseline
Extra payment vs 30-year—
Total interest saved—
Per extra $1/mo · interest avoided—
Pay-off with the 20-yr payment...on the 30-year note—
Effective interest that route—