The Treasury Bond Fantasy: Can You Actually Live Off U.S. Government Interest Forever?

A Ramp Capital tweet keeps making the rounds: every investor, deep down, has a fantasy that with enough money they would put their entire net worth into U.S. government bonds and live off the interest forever. The joke lands because it points at a real instinct. Once your portfolio is large enough, the marginal value of more growth falls and the marginal value of certainty rises.

Source: @RampCapitalLLC

The instinct is right. The literal implementation is wrong for almost everyone. This guide takes the meme seriously: how much capital you would actually need, how much of the coupon survives federal tax and inflation, where TIPS and I-bonds fit, and the situations where some version of the fantasy is a defensible plan.

What the Tweet Gets Right

At sufficient wealth, the planning question stops being “how do I maximize expected return?” and starts being “how do I buy freedom from labor income, equity volatility, and sequence-of-returns risk?” That instinct shows up in academic retirement-income research, where flooring essential spending with bonds and matching duration to liabilities is one of the best-supported strategies for retirees with a lot to lose and little to prove.

It also reflects a real shift in the bond market. For most of the 2010s, after-inflation Treasury yields were near zero or negative; buying long Treasuries locked in a guaranteed loss of purchasing power. Today the math is meaningfully better. Per the May 15, 2026 Federal Reserve H.15 release, the 30-year nominal Treasury yields 5.02% and the 30-year inflation-indexed Treasury (TIPS) yields 2.73% real, both as of May 14, 2026. The 10-year nominal yields 4.47% and the 10-year TIPS yields 2.00% real. The 10-year breakeven inflation rate sits around 2.49%. (For today’s numbers, see the Treasury yield curve dashboard.)

Those are usable planning rates. They are also not a free lunch.

The Two Risk-Free Rates Most People Conflate

The most important distinction in this entire conversation is the difference between two different kinds of risk-free.

Nominal Treasuries are close to risk-free in dollars. A 30-year Treasury at 5.02% will pay $50,200 every year per $1M of face value and return the $1M at maturity. The U.S. government has never failed to make that payment. But those payments are fixed in dollars. If inflation averages 2.5% over the next 30 years, the real value of the final coupon is about half the real value of the first one.

TIPS are close to risk-free in purchasing power. Per TreasuryDirect, principal adjusts with the Consumer Price Index, and at maturity investors receive the inflation-adjusted principal or the original principal, whichever is greater. A 30-year TIPS at 2.73% locks in a 2.73% real return above CPI for three decades.

When the tweet imagines “living off the interest forever, ” it is conflating these. Living off nominal Treasury coupons feels safe because the dollar amount never changes. That is precisely the problem. Living off TIPS coupons holds purchasing power steady but produces a lower nominal yield. The choice between them is the choice between a known dollar income that erodes and a known real income that costs more upfront.

The Interest-Only Math, Three Ways

Start with the simplest version of the question. How big does the portfolio need to be to fund $100,000 of spending from coupon interest alone?

At a 5.02% nominal yield, the gross arithmetic looks tidy: $100,000 divided by 5.02% is about $1.99M. That is the number most casual readers stop at. It is also wildly optimistic for three reasons.

First, the IRS taxes the coupon, not your real return. Treasury interest is exempt from state and local tax (per TreasuryDirect) but fully taxable as ordinary income at the federal level. For a married couple filing jointly with $400,000 of taxable income, the marginal federal bracket is 32%, and investment income above $250,000 MAGI triggers the 3.8% Net Investment Income Tax (per the IRS). Their effective federal rate on Treasury interest is 35.8%. The $100,000 coupon becomes $64,200 of spendable cash.

Second, inflation taxes the part the IRS doesn’t. If inflation runs at the 2.49% breakeven embedded in TIPS pricing, the real value of that $64,200 falls every year that the coupon stays fixed. By year 30, it is worth roughly $30,700 in today’s purchasing power. The investor still feels rich on paper. Their grocery store does not agree.

Third, $100,000 of real spending requires more bonds than the headline yield suggests. The right number for funding $100,000 of real annual spending forever from a portfolio is closer to $100,000 / 0.0273 = $3.7M in TIPS, since TIPS actually pay a real yield. That is roughly 1.8x the nominal-yield estimate. And even that number ignores phantom income tax, longevity beyond the 30-year maturity, and personal inflation that differs from CPI.

The clean lesson: the gross coupon is the marketing number. The after-tax real yield is the spending number. They are not even close.

Try It Yourself

Use the calculator below to see how much real, after-tax spendable income a Treasury portfolio actually produces under your own assumptions. The comparison row shows year-1 numbers across instruments; the chart shows how the 30-year nominal Treasury and 30-year TIPS diverge over time once inflation does its work.

Where TIPS Help, and Where They Hurt

TIPS solve the inflation problem. They do not solve the tax problem in a taxable account.

Annual TIPS interest is taxed federally each year along with the annual inflation adjustment to principal, even though the principal adjustment is not received in cash until maturity. The IRS spelled out the treatment in Notice 2011-21: positive inflation adjustments are includible in income each year under the coupon bond method. In a year with 3% inflation, a TIPS investor in a taxable account owes federal tax on the 3% principal increase, even though the investor does not collect that principal until the bond matures.

That is the phantom income problem. It makes TIPS noticeably less attractive in taxable accounts than the headline real yield suggests, and it sharpens account-location decisions. A working ranking for where to hold TIPS:

• Traditional IRA or 401(k): the cleanest fit. No annual tax on the inflation adjustment. The eventual distribution is taxed as ordinary income at retirement, which would have happened anyway for any bond.
• Roth IRA or Roth 401(k): clean but expensive. No phantom income tax and no tax on cash coupons. But Roth space is your most tax-efficient real estate. Filling it with a 2.73% real yield instead of higher-expected-return equities trades long-run growth for short-run inflation protection.
• Taxable account: workable but inferior. The federal phantom-income tax is real. The state-tax exemption partially offsets it for residents of high-tax states. Filing complexity increases because the inflation adjustment flows through on Form 1099-OID.

For most DIY investors with both Roth and tax-deferred space, TIPS belong in tax-deferred. The full mechanics and the calculator for ladder cost live in the TIPS ladder guide.

Where I-Bonds Fit (and Where They Don’t)

Series I savings bonds are an underrated tool, with one big constraint. Per TreasuryDirect, the composite rate for I-bonds purchased between May 1 and October 31, 2026 is 4.26%, made up of a 0.90% fixed rate plus an inflation component. Interest accrues monthly and compounds semiannually. The fixed-rate portion is locked in for the life of the bond.

I-bonds have the best tax profile of any inflation-protected Treasury security available to individual investors. Federal tax is deferred until redemption (per TreasuryDirect), state and local taxes do not apply, and there is no mark-to-market price risk to the holder. No 1099-OID, no phantom income.

The constraint is scale. Each person can buy at most $10,000 of electronic I-bonds per calendar year through TreasuryDirect (plus an additional $5,000 in paper bonds via tax refund). A married couple can do $20,000 a year between two SSNs, plus more via trusts and businesses if structured carefully. Even at the aggressive end, building a seven-figure I-bond position takes decades.

I-bonds are excellent as an inflation-protected emergency reserve, a slow-build retirement cash bucket, or a way to lock in today’s 0.90% fixed rate before it changes. They are the wrong tool for funding the “live off interest forever” fantasy because the annual purchase limit caps how much you can deploy.

Seven Risks the Fantasy Hides

Even with the right mix of nominal Treasuries, TIPS, and I-bonds, an all-bond portfolio has risks that a mixed-asset portfolio does not.

• Inflation risk. Nominal coupons buy less every year. At 2.5% inflation, real purchasing power halves every 28 years. At 4% inflation, every 18.
• Reinvestment risk. A T-bill ladder or a short-duration portfolio matures quickly. When rates fall, future coupons fall with them. The 2010s reminded a generation of bond investors that today’s yield is not tomorrow’s yield.
• Duration risk. Long bonds lock in income but fall sharply in price if rates rise and you need to sell before maturity. Held to maturity, the price drop is irrelevant. Forced to sell, it is not. See the asset-liability matching guide for the duration-matching framework.
• Tax drag. Treasury coupons are state-exempt but taxed federally as ordinary income. TIPS phantom income compounds this in taxable accounts. Compared to qualified dividends or long-term capital gains, which are taxed at preferential rates per IRS Publication 550, bond income gives up tax efficiency.
• Longevity risk. The longest Treasury issued is 30 years. “Forever” is not a feature of any Treasury instrument. Anyone retiring at 60 and planning to 95 needs to confront what happens after the ladder runs out.
• Opportunity cost. Stocks have outpaced bonds by roughly 3 to 5 percentage points per year over long periods (see real return of stocks). For a 30-year-old, the gap between an all-bond portfolio and a balanced one is millions in expected terminal wealth.
• Personal inflation mismatch. TIPS adjust with CPI-U, a broad measure of urban consumer prices. Retirees with above-average healthcare, long-term care, or property tax exposure can experience personal inflation that runs persistently above CPI. The hedge protects general inflation, not your inflation.

Why Withdrawal-Rate Research Says “Not Just Bonds”

Retirement-income research consistently finds that adding equities improves portfolio survival, not just expected wealth. Bill Bengen’s original 1994 work, archived on the FPA Journal site, found that retirees who held too few stocks ran out of money earlier than those holding 50 to 75% equities, because equity growth helped portfolios recover from inflation shocks.

Morningstar’s 2026 State of Retirement Income research reaches a similar conclusion with current capital market assumptions. The base-case safe starting withdrawal rate for a new retiree seeking 90% probability of success over 30 years is 3.9%, achieved by a portfolio with 30 to 50% in equities and the rest in bonds and cash. Higher equity weights raise expected terminal wealth but lower the safe starting rate because of volatility. Lower equity weights also lower the safe rate because bonds underperform on a real-return basis when inflation runs hot.

The retirement-research consensus is not “all bonds.” It is a balanced portfolio with enough equity exposure to fund decades of real spending, paired with enough fixed income to absorb sequence-of-returns shocks. The all-bond fantasy is closer to a rounding error in the literature than a strategy.

Who the Fantasy Actually Fits

There is a real population for whom some version of the all-bond portfolio is defensible.

• The overfunded. An investor with a net worth large enough that a 2% to 3% real return funds their entire desired lifestyle does not need the equity premium. They need to stop playing. If $20M produces $400,000 of inflation-protected spending from a TIPS-heavy portfolio and their actual spending is $200,000, they have already won. Marginal volatility produces no marginal happiness.
• The risk-intolerant retiree with a short horizon. A 75-year-old with a 15-year horizon, modest spending needs, and a strong preference for sleep over upside is in a different decision than a 30-year-old. The right asset allocation depends on remaining human capital, longevity expectations, and psychological capacity for drawdowns. See lifecycle asset allocation for the framework.
• The flooring case. An investor who wants the first $50,000 to $100,000 of essential spending guaranteed in real terms, with growth assets covering the rest, can use TIPS and I-bonds to build that floor. This is the strongest version of the meme: not 100% bonds, but a real-income floor inside a diversified portfolio.

The fantasy fails for almost everyone else: accumulators with decades of human capital ahead, underfunded retirees trying to outrun inflation, anyone with large bequest goals, and anyone who reads a coupon yield and forgets to subtract tax and inflation.

What to Actually Do Instead

Take the instinct seriously and reject the literal implementation. The practical version of the “live off the interest” dream is liability matching: pair each spending bucket with the asset class best suited to that obligation.

• Near-term cash needs (0 to 2 years): T-bills or a high-yield savings account. Nominal amounts, short duration, no inflation risk to worry about.
• Essential real spending (2 to 30 years): A TIPS ladder matched to expected real expenses in retirement. Add I-bonds opportunistically up to the annual cap as a tax-deferred inflation reserve.
• Discretionary and bequest spending (10+ years): A diversified global equity portfolio. The equity premium pays for the optionality that bond ladders cannot.
• Tail-risk and longevity protection: Social Security delayed to 70, which produces the highest available inflation-indexed lifetime income for most retirees. An inflation-adjusted SPIA for those who want more longevity insurance than Social Security alone provides.

Pair this with the right account location. Hold TIPS and nominal Treasury funds in tax-deferred accounts to avoid phantom income and ordinary-income drag. Hold equities in taxable accounts to capture qualified dividend and long-term capital gains rates. Save Roth space for the highest-expected-return assets you own. See the where to park cash guide for the short-duration side and the risk-free hurdle rate guide for why every risky asset needs to justify its expected return relative to a Treasury baseline.

Key Takeaways

• The instinct is correct; the literal trade is wrong. At sufficient wealth, prioritizing risk reduction over expected return is rational. Putting 100% of net worth into nominal long Treasuries is not.
• Nominal Treasuries are risk-free in dollars; TIPS are risk-free in purchasing power. The choice between them is the choice between a known erosion of real spending and a lower headline coupon today.
• Federal tax plus inflation cuts the headline yield in half or more. A 5.02% nominal coupon at a 35.8% federal rate and 2.5% inflation produces an after-tax real yield well under 1%.
• I-bonds have the best tax profile but the worst scale. The $10,000 annual electronic purchase cap rules them out as a standalone income engine.
• Account location matters more than instrument selection for taxable households. Put TIPS and nominal Treasury funds in tax-deferred accounts. Hold equities in taxable. Use Roth for highest-expected-return assets.
• Liability matching is the grown-up version of the meme. Floor essential spending with TIPS, fund growth and longevity with equities, and delay Social Security to 70.

Frequently Asked Questions

How much money would I really need to live off Treasury interest?

For $100,000 of pre-tax annual spending at today’s 5.02% 30-year Treasury yield, the gross math says about $1.99M. After a 32% federal marginal rate plus the 3.8% Net Investment Income Tax, the same coupon stream produces only about $64,200 of spendable cash, so funding $100,000 of after-tax nominal spending requires closer to $3.1M. If you want $100,000 of real spending forever from TIPS at 2.73% real, the upfront number is closer to $3.7M. The difference between the headline yield and the spending number is large and gets larger with higher tax brackets.

Are I-bonds a good substitute for the all-Treasury plan?

For tax efficiency, yes. For scale, no. The $10,000 annual electronic purchase limit per Social Security number means even a decade of maxed-out purchases produces only $100,000 of face value per person, which throws off about $4,000 to $5,000 of annual income at today’s composite rate. I-bonds are excellent as an inflation-protected reserve or tax-deferred bond sleeve, but they cannot carry the retirement on their own.

What about state taxes on Treasury income?

Treasury interest is exempt from state and local income tax, per TreasuryDirect. That makes Treasuries meaningfully more attractive than CDs or corporate bonds for residents of high-tax states like California or New York. For a resident of Washington, Texas, or Florida with no state income tax, the exemption is less valuable, and the Treasury vs. CD comparison shifts toward CDs if CDs offer a higher yield.

Does the 30-year Treasury yield change the answer at lower wealth?

Not really. A higher nominal yield raises the gross coupon but does not change the structural problem: federal tax compresses the nominal return, and inflation compresses the real return. The threshold wealth needed to fund a given real spending level falls as real yields rise, but the shape of the argument does not change. At a 2.73% real yield, the required portfolio for $100,000 real spending is about $3.7M. At a 1.0% real yield it would be $10M. Real yields are the variable that matters.

Should I move everything to bonds in a recession?

Generally, no. Tactical asset allocation has a poor track record for individual investors. The bond market is most attractive when real yields are high (now) and least attractive when they are compressed (most of the 2010s). The right time to add bonds is when the math is favorable and the role they play in your portfolio is clear. The right time to flee to bonds in a panic is rarely. See sequence of returns risk for the structural argument about derisking near retirement.

What is the difference between an I-bond and a TIPS?

Both adjust for inflation, but the mechanics differ. I-bonds are non-marketable savings bonds: the interest accrues to the bond, tax is deferred until redemption, there is no secondary market, and the annual purchase limit is $10,000 electronic per person. TIPS are marketable Treasury securities: they trade in the secondary market, pay semiannual cash coupons, are taxed annually on both coupons and principal adjustments, and can be bought in any size. I-bonds are a tax-friendly slow-build vehicle. TIPS are a scalable liability-matching instrument.

Related Guides

• TIPS Ladder Guide for the implementation playbook on building a real-income floor.
• Asset-Liability Matching for the framework that turns “live off the interest” into a defensible plan.
• The Risk-Free Hurdle Rate for why Treasury yields set the bar every risky asset has to clear.
• Safe Withdrawal Rate for the flexible-withdrawal alternative to the flooring approach.
• Where to Park Cash for the short-duration side of the bond decision: T-bills, high-yield savings, money market funds.
• The Best Inflation Hedges Are Boring for the broader argument about CPI-linked instruments versus stocks, gold, and Bitcoin.
• When to Claim Social Security for the cheapest available source of inflation-indexed lifetime income.

Sources

1. Federal Reserve, “H.15 Selected Interest Rates” (daily release). federalreserve.gov/releases/h15 (accessed 2026-05-16).
2. TreasuryDirect, “TIPS” product page (inflation adjustment, deflation floor, 5/10/30-year maturities). treasurydirect.gov/marketable-securities/tips (accessed 2026-05-16).
3. TreasuryDirect, “Tax Forms and Tax Withholding” (state-and-local exemption for Treasury interest). treasurydirect.gov (accessed 2026-05-16).
4. TreasuryDirect, “Fiscal Service Announces New Savings Bond Rates, Series I to Earn 4.26%” (May 1, 2026 announcement). treasurydirect.gov/news (accessed 2026-05-16).
5. TreasuryDirect, “Tax Information for EE and I Bonds” (federal-only taxation, deferral until redemption). treasurydirect.gov (accessed 2026-05-16).
6. TreasuryDirect, “How much can I spend / own?” ($10,000 annual electronic limit for I-bonds and EE-bonds per person). treasurydirect.gov (accessed 2026-05-16).
7. IRS, “Net Investment Income Tax” (3.8% rate; MAGI thresholds of $200,000 single/HoH and $250,000 MFJ). irs.gov (accessed 2026-05-16).
8. IRS, Notice 2011-21 (TIPS coupon bond method; annual taxation of principal inflation adjustments). irs.gov/pub (accessed 2026-05-16).
9. IRS, Publication 550, “Investment Income and Expenses” (qualified dividends and long-term gains taxed at 0/15/20%). irs.gov/publications/p550 (accessed 2026-05-16).
10. Bengen, W. P., “Determining Withdrawal Rates Using Historical Data,” Journal of Financial Planning, October 1994. Reprinted in FPA Best of 25 Years. financialplanningassociation.org (accessed 2026-05-16).
11. Morningstar, “What’s a Safe Retirement Withdrawal Rate for 2026?” (3.9% base case, 30-year horizon, 90% success, 30-50% equity). morningstar.com (accessed 2026-05-16).