Net Worth
$385KTop 42%PeakWorth
$4.2M+$182KNet Worth
$385KTop 42%PeakWorth
$4.2M+$182KFI Age
50y 1m-11moMost mortgage calculators tell you the monthly payment. Ours tells you what that payment trades you in retirement years — so you can choose on purpose.
Avg 30-yr fixed rate (2026)
~6.6%
PMI threshold
< 20% down
Total interest on $400K @ 6.6%
~$520,000
15-yr vs 30-yr interest savings
~60%
= $80,000 down · $320,000 financed
Monthly payment
$2,043.71
Total interest
$415,735
Total paid
$735,735
Loan term
30 years
| Year | Payments | Principal | Interest | Balance |
|---|---|---|---|---|
| 1 | $24,524 | $3,509 | $21,015 | $316,491 |
| 2 | $24,524 | $3,748 | $20,776 | $312,742 |
| 3 | $24,524 | $4,003 | $20,521 | $308,739 |
| 4 | $24,524 | $4,276 | $20,249 | $304,464 |
| 5 | $24,524 | $4,566 | $19,958 | $299,897 |
Estimates only. Excludes fees, escrow changes, and tax effects. For educational purposes — not financial advice.
Your monthly mortgage payment has four parts: principal, interest, taxes, and insurance (PITI). Add PMI if you put less than 20% down, plus HOA if applicable. Most online calculators only show principal + interest — and quietly underquote your real cost by 25–40%.
PeakWorth's calculator builds the complete payment, generates a full amortization schedule (month-by-month or year-by-year), and shows you exactly when your equity crosses key thresholds.
A 15-year mortgage typically saves 50–60% of the lifetime interest cost vs a 30-year — but the higher payment can crowd out retirement savings during your highest-earning years. The 'right' answer depends on whether you'll actually invest the difference.
Most disciplined investors come out ahead with a 30-year and aggressive 401(k)/Roth contributions. Most undisciplined investors come out ahead with a 15-year. Be honest about which one you are.
A refinance only makes sense if monthly savings recoup closing costs (typically $3K–$8K) within ~24 months AND you'll stay in the home longer than the break-even. Use the refinance mode to see your real break-even point — not the marketing one your lender quotes.
A calculator alone tells you the payment. PeakWorth tells you what that payment costs your retirement — and how every change ripples through the next 30 years of your finances.
Keep total housing (PITI + PMI + HOA) under 25–28% of gross income. To stay on track for early retirement, target under 25%.
Putting down 20% removes PMI. Going beyond 20% only makes sense if your mortgage rate is higher than your expected investment return.
Put at least 20% down, or use a piggyback loan, or refinance once your equity crosses 20% of current home value.
When monthly savings recoup closing costs in under 24 months and you'll stay 5+ more years.
Learn guides, true-cost calculators, and audience playbooks across the PeakWorth network.
Decision guide
Should you tap your home equity?
HELOAN vs HELOC vs cash-out — the FI Age trade-off.
Decision guide
Should you open a HELOC?
Draw period, variable-rate payment, and the real risk.
Cost of
Carrying credit card debt
22% APR compounded — the silent FI Age killer.
Cost of
Buying a $1M house
Mortgage + taxes + maintenance + opportunity cost.
Built for
PeakWorth for physicians
Late start, high income, six-figure debt — modeled together.
Compare
PeakWorth vs SoFi Automated Investing
SoFi’s 0.25% member robo vs the planning layer above.
PeakWorth includes every loan calculator above — connected to your real income, expenses, and goals. Every number you change updates your live FI Age and lifetime projection.
