Treasury Bond Ladder Calculator: Build Predictable Retirement Income

A bond ladder gives you a known cash flow on a known date — no maturity risk, no interest-rate guessing. For $1M–$5M investors funding near-term spending from a portfolio, it eliminates the need to sell equities in a down market. Treasury ladders add a state-tax exemption that corporate and CD ladders don't.

What is a bond ladder?

A bond ladder is a portfolio of individual bonds purchased today with staggered maturity dates — one bond maturing each year (or at another interval). When each bond matures, you receive its face value back, which you either spend or reinvest into a new long-rung bond to extend the ladder.

The "ladder" metaphor fits: the rungs are your maturity dates. The bottom rung matures soonest; the top rung is the longest out. As the bottom rung matures each year, you add a new top rung. The ladder rolls forward perpetually, always keeping your portfolio at a target average duration.

The core problem a ladder solves: if you hold a single bond fund and need cash in year two, you may be forced to sell fund shares at a loss if rates rose and NAV fell. If you hold individual bonds to maturity, you always receive par — price fluctuations in the interim are irrelevant. The ladder converts sequence-of-returns risk on your fixed-income allocation into a predictable cash-flow stream.

Why Treasuries specifically?

For $1M–$5M investors, Treasuries offer three advantages over CDs, corporate bonds, and bond funds at this asset level:

1. State and local tax exemption. Treasury interest is exempt from all state and local income taxes under 31 USC §3124 — a statutory guarantee unchanged since 1941. On a $500K ladder at 4.3%, that's $21,500/yr in coupon income. In California (9.3% marginal rate), you'd otherwise owe $2,000/yr in state tax on a CD with the same yield — making the Treasury ladder worth ~10 basis points more annually on an after-state-tax basis in CA, more in NY.¹
2. No credit risk. U.S. Treasuries are backed by the full faith and credit of the U.S. government. No FDIC limit to manage, no counterparty due-diligence, no creditworthiness monitoring. For investors with $1M+ in cash-equivalent fixed income, this matters — FDIC coverage caps at $250K per depositor per institution, requiring CD investors to spread deposits across multiple banks.
3. Liquidity. Treasuries trade in the deepest secondary market in the world. If your circumstances change before a rung matures, you can sell individual bonds within a business day — typically tighter bid-ask spreads than brokered CDs, especially for off-the-run issues.

Building your ladder: 4 steps

1. Decide on ladder size and purpose. How much of your fixed-income allocation should ladder vs. remain in a bond fund or cash? Rule of thumb: ladder only the income you plan to spend in the next 5–10 years. If you need $40K/year from bonds, a $400K–$800K ladder at 4–5% covers it. Don't ladder money you'll need quickly — keep that in a money market fund or T-bills (see Cash Management).
2. Choose your maturity range and rung spacing. A 5-rung, 1-year-spacing ladder (maturities in 2027, 2028, 2029, 2030, 2031) is simple and common for pre-retirees. A 10-year ladder (2027–2036) gives you a decade of known income. Longer ladders capture more yield from the upward-sloping curve; shorter ladders give you more reinvestment flexibility if rates rise.
3. Buy new issues at auction or on the secondary market. New Treasury notes and bonds are sold at auction via TreasuryDirect.gov (no fee, direct government purchase) or through any major brokerage (Fidelity, Schwab, Vanguard) at no commission. Secondary market purchases at a brokerage let you target exact maturity dates that don't align with current auction schedules. For most investors, brokerage secondary market is easiest.
4. Establish a reinvestment rule. When Rung 1 matures, do you: (a) spend the principal and coupon on living expenses, (b) reinvest into a new 5- or 10-year bond at the long end, or (c) let it sit in cash until you decide? Define this in advance. The "automatic reinvest into new long rung" approach keeps the ladder perpetually rolling. The "spend as income" approach is better for investors in full retirement drawing down principal.

Treasury ladder vs. CD ladder vs. bond fund

Tax mechanics: what you keep

Treasury coupon payments are taxed as ordinary income at the federal level — the same rate as wages, pension distributions, and RMDs. There is no preferential long-term capital gains rate. At a 24% marginal federal rate, a $21,500 coupon costs $5,160 in federal tax. The after-tax yield on a 4.3% coupon at 24% federal = 4.30% × (1 − 0.24) = 3.27% after-federal-tax.²

State exemption restores significant after-tax value in high-tax states. A California investor in the 9.3% bracket saves $2,000/yr in state tax on that $21,500 coupon. Effective after-all-tax yield: 4.30% × (1 − 0.24 − 0.00) = 3.27% vs. a comparable CD where they'd pay federal + CA state: 4.30% × (1 − 0.24 − 0.093) = 2.87%. The Treasury ladder outperforms by 40 basis points annually, purely from the state exemption.

NIIT consideration. Under IRC §1411, Treasury bond interest is included in net investment income — unlike earnings from an IRA or pension. If your MAGI exceeds $200,000 (single) or $250,000 (MFJ), an additional 3.8% NIIT applies to the lesser of your net investment income or the MAGI excess. At high income levels, this adds roughly 3.8% more tax on coupon income. The calculator above flags this when applicable.

Asset location. If you hold Treasuries inside a traditional IRA, coupons grow tax-deferred but lose the state tax exemption (IRA distributions are fully taxable as ordinary income, including the state component). For investors in high-tax states, holding Treasuries in a taxable account and capturing the state exemption is often better than placing them in a traditional IRA. Roth IRA is ideal for assets with high return potential (equities), not low-yield bonds. See Asset Location Guide for the full framework.

When a bond ladder doesn't make sense

• Accumulation phase with a long horizon. If you're 45 with a 20-year runway and no near-term spending need from fixed income, a low-cost bond index fund or target-date fund is simpler and comparable in outcome. The precision of a ladder matters most when you have specific near-term income requirements.
• Small amounts per rung. Below roughly $25K–$50K per rung, the administrative overhead of managing 5–10 individual bond positions outweighs the state-tax benefit. At that size, a Treasury bond ETF (like BIL, SHY, IEF, TLT) or a brokerage's automated bond ladder product (Fidelity, Wealthfront, Schwab) is more practical.
• Falling rate environment with a long time horizon. In a rapidly falling-rate environment, locking into fixed coupons on long rungs means you miss the price appreciation a bond fund captures through NAV gain (since fund shares rise when rates fall). Individual bonds held to maturity always return par — that's safety at maturity but foregone capital gain in a falling-rate market. For long durations in a falling-rate environment, a bond fund is better.
• Taxable account with frequent rebalancing needs. Managing 10+ individual bond positions across multiple maturity years adds complexity if you need to rebalance against equities frequently. A bond fund handles this cleanly.

Bond ladder and advisor coordination

A well-structured bond ladder is one component of a broader retirement income plan — coordinated with Social Security timing (Social Security Guide), Roth conversion windows (Roth Conversion Guide), and RMD management (RMD Strategy). A fee-only financial advisor can model how your ladder interacts with your other income sources and help size it appropriately so you're not over-allocated to low-yield bonds relative to your growth assets.

Sources

1. 31 USC §3124 — Exemption from taxation of government obligations (LII / Cornell Law School)
2. IRS Publication 550 — Investment Income and Expenses (federal tax treatment of bond interest)
3. Charles Schwab — Bond Laddering Strategy and Tools
4. Fidelity — How to Build a Bond Ladder

Tax values verified as of June 2026. Federal brackets per IRS Rev. Proc. 2025-32. Approximate Treasury yields per Federal Reserve H.15 and TreasuryDirect.gov (June 2026). State tax exemption per 31 USC §3124. NIIT per IRC §1411. Calculator output is an estimate only — not investment, tax, or legal advice.