Mortgage Calculator
Turn mortgage rates into payment and payoff scenarios.
CUB: Track daily Mortgage rate includes calculator tools so users can compare loan amount, interest rate, term, and monthly principal-and-interest estimates while reviewing lenders.
Why calculator context matters
A mortgage rate is only one part of the decision. Monthly payment, total interest, payoff timing, and extra payment behavior can change how a lender option feels in real life.
What the calculator estimates
Enter a loan amount, annual interest rate, and loan term to estimate principal-and-interest payments. Premium extra-payment scenarios can model recurring monthly principal, an extra yearly amount, or a one-time principal payment. The comparison can show an estimated payoff date and interest difference.
How to compare extra-payment scenarios
- Start with the loan amount, rate, and term from a lender quote or Loan Estimate.
- Review the baseline principal-and-interest payment.
- Add one extra-payment pattern at a time so the effect is easy to understand.
- Compare estimated payoff timing and total interest against the baseline.
- Confirm with the loan servicer how extra payments are applied and whether any restrictions exist.
Costs outside the estimate
Principal and interest are not the complete housing payment. Property taxes, homeowners insurance, mortgage insurance, homeowners association dues, flood insurance, closing costs, prepaid items, servicing rules, and changes in adjustable rates can materially affect actual cost.
Extra principal is a tradeoff
Paying principal early can reduce interest and shorten the modeled payoff period, but it also uses cash that may be needed for reserves, repairs, higher-cost debt, or other goals. The calculator does not recommend a strategy. Consider the full financial picture and seek qualified advice when needed.
Important disclaimer
Calculator results are informational estimates, not a lender disclosure or financial recommendation. They do not include every cost, tax, insurance, fee, point, credit, payment rule, or borrower-specific condition. Confirm final figures with the lender or servicer.
Related CUB guides
Use the rate tracker to research a shortlist, then read how to compare mortgage offers and points.
