Here’s my monthly survey of the best interest rates on cash as of May 2026, roughly sorted from shortest to longest maturities. Banks and brokerages love taking advantage of idle cash, and you can often earn more interest while keeping the same level of safety by moving to another FDIC-insured bank or NCUA-insured credit union. Check out my Ultimate Rate-Chaser Calculator to see how much extra interest you could earn from switching. Rates listed are available to everyone nationwide. Rates che...
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