How to Live Off of Interest: Principal, Bonds, and Taxes

To live off interest, you need enough principal that the yearly interest alone covers your spending without ever drawing down the balance. The math is one line: divide your real annual expenses by the interest rate you can reasonably earn, and the result is the principal required. A household spending $60,000 a year at a 4% yield needs $1.5 million. The work sits in the details around that number: picking the right mix of accounts, understanding what taxes and Medicare premiums take out, and building in enough cushion to survive decades of inflation.

How Much Principal You Actually Need

Start with what you really spend, not what you think you spend. Pull twelve months of bank and credit card statements and total every category: housing, food, insurance, healthcare, transportation, travel, and the rest. People routinely underestimate by 15% to 20% because they forget irregular costs like car repairs, home maintenance, and holiday spending. Add a line for those before you do any division.

Then divide by a conservative annual interest rate. At 4%:

$40,000 per year in spending needs $1,000,000 in principal
$60,000 per year needs $1,500,000
$80,000 per year needs $2,000,000
$100,000 per year needs $2,500,000

Those figures assume the rate holds, which it won’t. High-yield savings accounts were paying roughly 4% to 5% APY in early 2026, but those rates float and drop when the Federal Reserve cuts its benchmark. Treasuries have recently yielded about 4% to 4.75% depending on maturity. Plan with a conservative rate, not today’s best offer.

Inflation is the second variable the formula doesn’t show. If prices rise 2.5% a year, $60,000 of expenses becomes roughly $77,000 in ten years and $98,000 in twenty. A fixed principal earning a fixed rate loses purchasing power unless the yield consistently beats inflation. Building a cushion of 20% to 30% above the minimum calculated principal gives you room to absorb rising costs without touching the base.

One boundary worth naming: the “4% rule” from retirement planning is not the same thing. That rule assumes you spend down the principal over roughly 30 years. Living off interest means never touching principal at all, and that generally requires a larger starting balance or a lower withdrawal rate than the 4% rule contemplates.

Where to Hold the Money

No single account does this job well. The usual structure is a mix that balances yield, liquidity, and safety.

High-Yield Savings Accounts

Online banks tend to pay noticeably more than brick-and-mortar institutions, and the money stays fully liquid. The weakness is that rates can change at any time, so the income is not predictable beyond a few months. These accounts work best as the flexible layer sitting on top of longer-term holdings.

Certificates of Deposit

CDs lock your money at a fixed rate for a set term, usually three months to five years. You get rate certainty in exchange for reduced access. Federal law sets a minimum early-withdrawal penalty of seven days’ simple interest for withdrawals within the first six days after deposit, but most banks impose far steeper penalties — often several months of interest — and there is no federal cap on the amount.¹ Read the specific terms before signing.

Treasury Bonds and Notes

Treasury bonds run 20 or 30 years; Treasury notes run 2 to 10 years. Both pay a fixed rate every six months until maturity.² You buy them through TreasuryDirect.gov, and interest lands in your linked bank account on schedule. Default risk is effectively zero. The real risk is opportunity cost: if rates rise after you buy, you are locked in or must sell on the secondary market at a loss.

TIPS and I Bonds

Treasury Inflation-Protected Securities adjust their principal up with inflation and down with deflation, with interest paid on the adjusted amount. At maturity you receive the inflation-adjusted principal or the original face value, whichever is higher.³ Fixed coupon rates on TIPS tend to be lower than regular Treasuries because the inflation adjustment is itself part of the return.

Series I Savings Bonds combine a fixed rate with a variable inflation rate that resets every six months. Each person can buy up to $10,000 in electronic I Bonds per calendar year.⁴ That cap keeps them from being a primary income source, but they work as a supplemental inflation hedge.

Municipal Bonds

Bonds issued by state and local governments usually pay interest exempt from federal income tax, which is what makes them attractive to higher-income holders. The tradeoff is credit risk: unlike Treasuries, muni issuers can fail to pay. Lower-rated bonds pay higher interest to compensate, and even insured bonds are only as sound as the insurer behind the guarantee.⁵

Building a Ladder

Rather than locking everything into one maturity date, a ladder spreads principal across CDs or bonds with staggered maturities. Split $500,000 into five CDs maturing in one, two, three, four, and five years. Each year the maturing CD reinvests at the longest term. After the initial setup, something matures every year, giving you regular access without early-withdrawal penalties. The same works with Treasury notes and bonds. This is where most people living off interest end up, because it keeps income predictable while leaving some flexibility to react to rate changes.

Keeping the Principal Insured

When your whole financial life rests on a pool of savings, the safety of those deposits matters in a way it didn’t during your working years. Federal insurance covers you if a bank, credit union, or brokerage fails, but only up to specific limits.

FDIC covers $250,000 per depositor, per insured bank, for each ownership category. Accounts at the same bank in the same category are combined when calculating coverage.⁶
NCUA covers $250,000 per member at each federally insured credit union, including principal and posted dividends through the date of any closure.⁷
SIPC provides up to $500,000 in total protection if a member brokerage fails, with a $250,000 limit for cash. SIPC does not protect against investment losses, only against the firm’s financial failure.⁸

If your principal exceeds $250,000, spread it across multiple institutions so each account stays within the limit. Different ownership categories at the same bank — individual, joint, and certain trust arrangements — each get their own $250,000 in FDIC coverage. For someone whose daily life depends on $1.5 million in deposits, structuring around these limits is not optional.

How Interest Income Is Taxed

Interest is taxed as ordinary income at the federal level, the same as wages. There is no preferential rate like you get on long-term capital gains or qualified dividends.⁹ Federal rates for 2026 run from 10% to 37% depending on taxable income.¹⁰ Any payer that credits you more than $10 in interest during the year sends a Form 1099-INT reporting the total, and that amount goes on your return.¹¹

The standard deduction shelters a slice of that income. For 2026 it’s $16,100 for single filers and $32,200 for married couples filing jointly.¹⁰ A single filer with $60,000 of interest would owe federal tax on roughly $43,900 after the standard deduction, not the full $60,000. Your effective rate is lower than the marginal bracket suggests.

Three features of the tax code deserve attention when the whole paycheck is interest:

Municipal bond interest. Interest from most state and local bonds is excluded from federal gross income.¹² Certain private activity bonds and arbitrage bonds don’t qualify, but for standard munis the savings are real. Someone in the 24% federal bracket earning $30,000 of muni interest saves $7,200 in federal tax compared with the same income from a CD.

Treasury interest and state tax. Interest from Treasury bonds, notes, TIPS, and I Bonds is federally taxable but exempt from state and local income tax by federal law.¹³ In a high-tax state, this meaningfully improves after-tax yield compared with CDs and savings accounts, which are taxable at both levels.

Net investment income tax. A 3.8% surtax applies to the lesser of net investment income or the amount by which modified adjusted gross income exceeds $200,000 for single filers or $250,000 for joint filers.¹⁴ Those thresholds are not indexed for inflation, so more households cross them every year. If you earn enough interest to live on, you may be above them already.

Quarterly Estimated Tax Payments

With no employer withholding, you pay the IRS directly, and not just in April. If you expect to owe $1,000 or more for 2026 after any withholding and refundable credits, you generally need to send quarterly estimated payments.¹⁵ For almost anyone living on interest alone, this applies.

The 2026 due dates are April 15, June 15, September 15, and January 15, 2027. You avoid underpayment penalties by paying at least 90% of the current year’s tax liability or 100% of last year’s, whichever is smaller. If your prior-year adjusted gross income exceeded $150,000, the second threshold rises to 110%.¹⁵ Missing a quarter doesn’t only trigger penalties; it creates a cash flow problem in April, when the shortfall lands on top of the current quarter’s bill.

Medicare Premium Surcharges

This is the tax trap most people planning this life don’t see coming. On Medicare, your interest income counts toward the modified adjusted gross income that sets your monthly premium. Above certain thresholds, income-related monthly adjustment amounts (IRMAA) stack on top of the standard Part B premium. For 2026, a single filer with MAGI above $109,000 or a joint filer above $218,000 starts paying surcharges.¹⁶

The surcharges rise in tiers. At the first tier, a single filer with MAGI between $109,000 and $137,000 pays an extra $81.20 a month for Part B, bringing the total to $284.10 instead of the standard $202.90. At the top tier, someone with $500,000 or more in MAGI pays $689.90 a month.¹⁶ Similar surcharges apply to Part D. If your interest income pushes you across these lines, add the higher premiums to the annual spending number you divide by your yield. The gap can run several thousand dollars a year.

Moving the Interest Into Your Spending Account

Most interest-bearing accounts don’t come with a debit card or checkbook, so the earnings have to move to the account you spend from. The standard tool is an Automated Clearing House transfer, the same electronic network used for direct deposit and automatic bill payments.¹⁷ Inside your bank’s portal, link your checking account using its routing and account numbers, then set up recurring transfers on a schedule that matches your bills.

Standard ACH transfers usually settle by the next business day, and same-day ACH is available at many institutions for time-sensitive moves.¹⁸ A monthly transfer that mimics a paycheck tends to be the easiest to budget around. Transfer only the interest earned, never the principal. Once the link between institutions is verified, the transfers run automatically, the principal stays put, and the income flows to where you spend it.

1
HelpWithMyBank.gov. What Are the Penalties for Withdrawing Money Early From a Certificate of Deposit
2
TreasuryDirect. Treasury Bonds
3
TreasuryDirect. Treasury Inflation-Protected Securities (TIPS)
4
TreasuryDirect. How Much Can I Spend on Savings Bonds
5
Municipal Securities Rulemaking Board. Evaluating a Municipal Bonds Default Risk
6
FDIC. Deposit Insurance at a Glance
7
MyCreditUnion.gov. Share Insurance
8
SIPC. What SIPC Protects
9
Office of the Law Revision Counsel. 26 USC 61 – Gross Income Defined
10
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
11
Internal Revenue Service. About Form 1099-INT, Interest Income
12
Office of the Law Revision Counsel. 26 USC 103 – Interest on State and Local Bonds
13
Office of the Law Revision Counsel. 31 USC 3124 – Exemption From Taxation
14
Internal Revenue Service. Topic No. 559, Net Investment Income Tax
15
Internal Revenue Service. 2026 Form 1040-ES Estimated Tax for Individuals
16
Centers for Medicare and Medicaid Services. 2026 Medicare Parts A and B Premiums and Deductibles
17
Board of Governors of the Federal Reserve System. Automated Clearinghouse Services
18
Federal Reserve Financial Services. FedACH Processing Schedule