Live tool: https://ababa1326.github.io/gracewindow/
When a CD matures, the penalty-free exit window is usually only 7–10 days. GraceWindow shows exactly when that grace period opens and closes before the CD auto-renews for another term.
- Enter your CD balance, maturity date, and bank's grace-period length
- See the exact penalty-free window for withdrawing, moving, or changing the CD
- Compare the bank's renewal APY with a better available rate
- Estimate the extra interest available by moving the balance
- Download a one-time calendar reminder for two days before maturity
Everything runs in your browser. No accounts, no server, no analytics, no connection to your bank — the numbers you type never leave the page.
One self-contained index.html. Vanilla JavaScript, zero dependencies, no build step.
Hosted free on GitHub Pages.
ZeroEnds calculates what to pay before a 0% APR promo ends. ReportsLow calculates what to pay before a credit card balance is reported.
Educational tool, not financial advice. Confirm grace-period lengths, renewal rates, and early-withdrawal penalties with your bank.