Savings Bonds Let You Defer Federal Tax Until You Cash Them. Here’s When That Helps.
That shoebox of old savings bonds represents decades of deferred federal tax, and the year you cash them can mean the difference between a modest tax bill and a Medicare surcharge that follows you for years.
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Picture a retired couple with a shoebox of paper savings bonds: birthday gifts, payroll-deduction purchases, a few from a parent’s estate. They’ve never paid a dime of federal tax on the interest. The IRS is simply waiting for one of two events: the day they cash the bonds or the day the bonds stop earning interest.
That built-in delay is a real perk of Series EE and Series I savings bonds. You get to choose the year the interest shows up on your return. Choose badly, or let the calendar choose for you, and decades of interest can land in a single year. That one spike can push you into a higher bracket, make more of your Social Security taxable and raise your Medicare premiums.
How Savings Bond Tax Deferral Actually Works
Most people file as cash-method taxpayers, and IRS rules give them two options. Under Method 1, you postpone reporting the interest until the earlier of the year you cash or dispose of the bonds or the year they mature. Under Method 2, you report each year’s increase in redemption value (what the bond would pay if you cashed it) as interest.
The choice covers all your bonds: you must use the same method for all Series EE and Series I bonds you own. If you never reported the interest year by year, you’re on Method 1 by default.
Two more rules matter. Interest on U.S. savings bonds is exempt from state and local taxes. And deferral ends at final maturity, the date a bond stops earning interest. At that point the deferred interest becomes taxable for that year, whether or not you cash the bond.
Deferral Pays Off When You Pick a Low-Income Year
Deferral works best when you control the timing. Many retirees find their best window opens after the paychecks stop and before required minimum distributions or Social Security begin. Taxable income may be at a decades-long low, so the bond interest fills the lowest brackets first.
Social Security timing matters most. Under 26 U.S.C. §86, your benefits start to become taxable once your modified adjusted gross income plus half your benefits passes a base amount of $25,000 for most single filers or $32,000 on a joint return. A second level kicks in at $34,000 and $44,000. If you cash bonds before benefits start, that interest stays out of the formula entirely.
There’s also a narrower break for education. Through the Education Savings Bond Program, you may be able to exclude from income all or part of the interest if you pay tuition and fees for yourself, your spouse or a dependent in the same year. The bond must be a Series EE bond issued after 1989 or a Series I bond, and the owner must have been at least 24 years old before the bond’s issue date. Married couples filing separately can’t use it. For 2025, the exclusion phased out between $99,500 and $114,500 of MAGI ($149,250 and $179,250 on a joint return).
When Decades of Interest Hit One Tax Return
Bonds bought years apart can reach final maturity in groups, and some owners cash the whole stack at once. Either way, decades of interest arrive as ordinary income in a single year.
That jump can also raise your Medicare bill through IRMAA, an income-based premium adjustment. It’s a surcharge on Parts B and D for higher-income enrollees, based on a tax return from two years earlier. For 2026, the Part B premium starts at $202.90 a month. A single filer with MAGI over $109,000 ($218,000 joint) pays $284.10. Above $137,000 ($274,000 joint), it’s $405.80. A Part D surcharge starting at $14.50 comes on top. Each level is a threshold, so going one dollar over a line means paying the full higher premium.
Death adds another layer. When an owner who deferred dies, the surviving spouse or executor can include on that return all interest earned on the bonds before the decedent’s death, meaning the final return. If they don’t, the interest becomes income in respect of a decedent: income the person earned but never paid tax on, which the heir then reports. It may qualify for the estate tax deduction, but it doesn’t get a step-up in basis under 26 U.S.C. § 1014(c). It’s one of several quiet IRS rules that can drain a retirement account at exactly the wrong moment, and we covered the rest in a free guide here.
Three Moves Before Your Bonds Decide for You
- Find every bond. Check safes, files and a parent’s papers. The issue date is printed in the upper-right corner of a paper bond and shown in TreasuryDirect for an electronic bond.
- Check maturity status through TreasuryDirect. A bond past final maturity earns nothing. If it matured in an earlier year, that year’s return was where the interest went, and that’s worth raising with a tax preparer.
- Spread out redemptions. Cash a portion each year, sized to stay below the next bracket or IRMAA line. Switching to annual reporting under Method 2 is another option, since you can do so under IRS rules.
Choose Your Tax Year or the Calendar Will
Savings bond deferral rewards owners who plan the year they cash out. It punishes those who let final maturity dates or an estate pick the year for them. Lining up redemptions with Social Security, RMDs and IRMAA thresholds is the kind of math worth running with a CPA or fiduciary tax advisor before the bonds stop earning interest.
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Vilma Rios is a tax professional and tax content contributor with more than 15 years of experience in tax and accounting. She specializes in federal tax research, tax education, and translating complex tax rules into clear, practical information for individuals, families, and small-business owners.
Vilma is a Content Tax Contributor II with the National Association of Tax Professionals (NATP), where she contributes to tax education and professional content. She has also presented tax information through webinars, including Spanish-language tax education, and has appeared on Telemundo 47 discussing tax topics and helping viewers understand important tax-filing requirements.
Her experience also includes tax and accounting work, tax research, IRS-related matters, and public tax education. While in college, Vilma volunteered in an IRS-sponsored tax assistance program and was recognized for her community service by local and state officials.
Known as “Your Tax Geek,” Vilma is passionate about making taxes easier to understand and helping people navigate an increasingly complex tax system.
