Amortization · Extra Payments · Lump Sums · Recast Analysis
Purchase & Financing
Additional Monthly Costs
Add recurring extra principal payments. Each series can have its own frequency and date range. Changes update results automatically.
Each row is an independent payment series
No extra payments yet — click "Add Series" to start.
Apply lump-sum payments on specific dates — bonuses, tax returns, etc. Applied as a principal reduction on that month's payment.
Each row is a one-time payment on a specific date
No lump-sum payments yet — click "Add Payment" to start.
Recast applies a lump sum to principal then lowers your monthly payment by re-amortizing over the remaining term.
Extra payment keeps the same monthly amount but pays off sooner. Compare both strategies side-by-side.