Bond Ladder Calculator: How to Build Predictable Income in Retirement

A bond ladder staggers maturities so a portion of your fixed-income portfolio matures every year, providing predictable income regardless of interest rate movements.

Instead of putting $200,000 into a single 5-year bond, you split it: $40,000 maturing in year 1, $40,000 in year 2, and so on. Each year, a rung of the ladder matures and you either spend it or reinvest at whatever rates are available.

How a Bond Ladder Works

$200,000 invested, 5-year Treasury ladder (2026 approximate rates):

Maturity	Amount	Yield	Annual Interest
1-year	$40,000	4.6%	$1,840
2-year	$40,000	4.4%	$1,760
3-year	$40,000	4.3%	$1,720
4-year	$40,000	4.2%	$1,680
5-year	$40,000	4.2%	$1,680
Total	$200,000	4.34% avg	$8,680/yr

Each year:

Year 1 bond matures → $40,000 + $1,840 = $41,840 becomes available
Option A: Spend it for income
Option B: Reinvest as a new 5-year bond at current rates, extending the ladder

Bond Ladder vs. Bond Fund

	Bond Ladder	Bond Fund
Interest rate risk	Minimal: you hold to maturity	High. NAV falls when rates rise
Predictability	Exact maturity amounts known	Fluctuates with market
Flexibility	Low: bonds locked up	High: sell anytime
Yield	Lock in current rates	Varies with market
Management	Manual reinvestment	Automatic
Best for	Income needs at specific dates	Long-term growth or short-term access

In a rising rate environment, bond fund NAVs fall. A bond ladder is immune to this because you hold each bond to maturity and receive exactly what was promised.

10-Year Ladder for Retirement Income

$500,000 ladder, $50,000 maturing each year:

Year	Maturity	Approximate Yield	Maturity Value
1	$50,000	4.6%	$50,000
2	$50,000	4.4%	$50,000
3-5	$50,000 each	~4.2%	$50,000 each
6-10	$50,000 each	~4.0-4.2%	$50,000 each

Each year, $50,000 is available for spending without selling any equity. This provides the income floor while keeping the equity portion untouched for growth.

Types of Bonds for Ladders

Bond Type	Pros	Cons
US Treasuries	Zero credit risk, state tax-free	Lower yield than corporates
TIPS (inflation-adjusted)	Principal grows with inflation	Lower nominal yield
CDs (bank)	FDIC insured	Less liquid than Treasuries
Investment-grade corporate bonds	Higher yield	Credit risk, more complex
Municipal bonds	Tax-free income	Lower yield pre-tax, credit risk

For most retirees, Treasuries (state-tax-free, zero credit risk) and CDs (FDIC insured) are the safest choices for a retirement income ladder. Corporate bonds add yield but require credit research.

Building a Ladder with TreasuryDirect

US Treasuries can be purchased commission-free directly at TreasuryDirect.gov:

Open a TreasuryDirect account (free)
Purchase T-notes in the maturities you need
Bills mature at face value; interest paid semi-annually on notes
Set calendar reminders for maturity dates

Minimum purchase: $100. Typical increments: $1,000. Most practical ladder builds use $10,000-$50,000 per rung.

The TIPS Ladder for Inflation Protection

A TIPS (Treasury Inflation-Protected Securities) ladder is similar but the principal adjusts with the CPI each year. Better for retirees worried about inflation eroding purchasing power:

Nominal Treasury: lock in $50,000 maturity in 5 years
TIPS: lock in "$50,000 in today's purchasing power" in 5 years. Actual maturity value adjusts upward with inflation

TIPS yields are lower (currently approximately 1.8-2.2% real yield vs. 4.2-4.6% nominal Treasury) but the inflation adjustment compensates. For retirements extending 20-30 years, TIPS ladders better preserve real purchasing power.

Frequently Asked Questions

How long should my bond ladder be?

Retirement income ladders typically span 5-15 years. A 10-year ladder covers a decade of guaranteed income while the equity portfolio handles long-term growth. As each year passes, you can extend the ladder by adding a new long-dated bond, maintaining the same structure indefinitely.

What happens if I need money before a bond matures?

Treasuries can be sold in the secondary market anytime. However, if interest rates have risen since you bought, you will receive less than face value. This is why bond ladders work best for income you plan to spend on schedule. Not as an emergency fund. Keep a separate cash/HYSA emergency fund outside the ladder.

Is a CD ladder better than a Treasury ladder?

CDs often pay slightly more than Treasuries of similar duration. But CDs have early withdrawal penalties and are bank-institution-specific (FDIC insured up to $250,000 per bank). Treasuries are more liquid and state-tax-exempt. For amounts under $250,000 per bank, CDs can be a reasonable higher-yield alternative to Treasuries in a ladder.

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