The long-tail ledger · 30-year fixed · principal & interest
Mortgage payoff, loan by loan
Each page below is the full 30-year ledger for one loan: the monthly payment, the lifetime interest, the long middle where payments buy mostly interest, and the corrections that $100 to $1,000 a month of extra principal writes into it. Every figure is computed by the same engine as the payoff calculator, which also runs any loan not listed here, at any term, with your own start date.