CD guides

Everything a certificate of deposit can do to your money, set out in plain language — every guide wired to the calculator that proves it.

New to certificates? Read in order: How CD interest works hands you the vocabulary, How to choose a CD term matches the product to your calendar, and the laddering guide covers the structure most savers end up wanting anyway. Treat the tax and early-withdrawal guides as reference material — read them when the situation arises, and ideally before you sign anything.

A certificate of deposit is a fixed-term loan you make to a bank: you promise not to touch the money for a set period, and in return the bank fixes the rate for that whole period and insures the balance through the FDIC — or the NCUA at a credit union — up to $250,000 per depositor, per institution, per ownership category. That is the entire product. Every decision worth making about one reduces to four questions: how much to commit, how long to commit it for, what the bank charges if you got that second question wrong, and what happens on the day it matures.

These guides take them in that order. How CD interest actually works deals with APY, compounding frequency and why the two are not one number. How to choose a CD term tackles the commitment itself, and CD laddering with the structure that saves you having to pick just one. Early withdrawal penalties sets out what breaking one costs and when it remains the right move, and how CDs are taxed handles the annual bill on interest you cannot yet withdraw — the detail that most often turns a good headline rate into a mediocre real one.

Each guide takes a position rather than listing considerations, and each publishes the arithmetic behind it. Where a figure appears, it comes from the same engine as the CD interest calculator, the sources are cited at the foot of the page, and the update date is the guide’s own rather than a site-wide stamp. If you disagree with a conclusion, the numbers are there to check it against.