A $100,000 six-month certificate of deposit (CD) could generate between about $1,980 and $2,078 in interest at some of the most competitive rates available in the US this month.
The short-term accounts offer savers a way to secure a fixed return while keeping their money tied up for only half a year. Based on rates ranging from 4.00% to 4.20% APY, a deposit of $100,000 would grow to between approximately $101,980 and $102,078 by maturity.
How much interest can a $100,000 six-month CD earn?
At a 4.00% APY, the account would earn around $1,980.39 over six months. At 4.15%, the return would rise to approximately $2,053.91, while a 4.20% account would produce about $2,078.40.
The calculations assume the money remains in the account until the maturity date and that no early-withdrawal penalty is applied. Rates and terms can vary between banks, so the precise return will depend on the provider and the account’s conditions.
Several leading six-month CD listings were showing rates of up to 4.20% in early September 2026. Some accounts have no minimum deposit, while others require savers to put down $500, $1,000 or more to qualify.
For anyone placing $100,000 with an FDIC-insured bank, the full deposit would generally fall within the standard $250,000 insurance limit for each depositor, per insured bank and ownership category. This can help protect the principal if the institution fails, although savers should check that the bank is covered before opening an account.
A CD normally fixes the interest rate for the agreed term, unlike many easy-access savings accounts whose returns can change. That certainty can be useful when rates are moving or when a saver wants to preserve cash while deciding what to do with it over the longer term.
However, the money is not designed to be freely accessible. Withdrawing funds before the six-month term ends will usually trigger an early-withdrawal penalty, which can reduce or eliminate the interest earned. The Consumer Financial Protection Bureau advises consumers to understand those charges before committing their money.
The six-month term also gives savers a relatively short point at which to reassess their options. Once the CD matures, the money can be withdrawn, rolled into another certificate, moved to a different savings account or invested elsewhere, depending on the economic conditions at the time.
That flexibility comes at the cost of potentially lower returns than riskier investments. Stock market investments may deliver higher long-term gains, but they do not guarantee that the original $100,000 will be preserved over a six-month period.
Anyone considering a six-month CD should compare the annual percentage yield, minimum deposit, insurance status, maturity rules and early-withdrawal penalty before choosing an account. The highest advertised rate may not be the most suitable if the money might be needed before the term expires.
