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Iinflation-linkedU.S. Treasury
Banking & Savings·5 min read·Lesson 6 of 9

I-Bonds: inflation-protected savings

A government savings bond whose interest rate adjusts with inflation. Useful for medium-term savings, with some annoying restrictions.

Written for plain-English understanding by Joseph Citizen. Why I built this →

Series I Savings Bonds — usually called I-Bonds — are US savings bonds whose interest rate has two parts: a fixed rate that stays the same for the life of the bond, and a variable rate that adjusts every six months based on inflation.

Why people use them

  • Guaranteed to keep up with inflation — your purchasing power doesn't erode
  • Backed by the US government — no default risk
  • Federal income tax deferred until you cash out; exempt from state and local tax
  • Can be tax-free if used for qualified education expenses

The annoying restrictions

  • $10,000 per person per year purchase limit (electronic)
  • Must be held at least 1 year — no early withdrawal allowed
  • Withdraw before 5 years and you forfeit the last 3 months of interest
  • Only sold through TreasuryDirect.gov, which has a clunky interface

When they make sense

Money you won't need for at least 5 years, but want kept safe with inflation protection. Not for emergency funds (locked up), not for long-term retirement (stocks usually do better), but useful as a middle layer.

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Important

This lesson is general financial education only. It is not personal investment, tax, accounting, or legal advice. Examples are illustrative. Past performance does not guarantee future results.