What is a Treasury bill ladder?

A Treasury bill ladder is an institutional cash management strategy where capital is divided equally across multiple Treasury bills with staggered maturity dates (e.g. 4-week, 8-week, 13-week, or 26-week bills). As each rung matures, the principal and discount interest are returned to cash or reinvested into a new bill at the end of the ladder, ensuring continuous liquidity and mitigating interest rate risk.

Are Treasury bill ladders completely exempt from state and local income taxes?

Yes. Under 31 U.S.C. § 3124, obligations of the United States Government, including Treasury bills, are immune from taxation by or under State or municipal authority. In high-tax states such as California, New York, and New Jersey, this state tax exemption provides a substantial yield advantage over commercial bank CDs and High-Yield Savings Accounts (HYSAs).

Why do Treasury bill auctions and maturities settle on Thursdays?

The U.S. Department of the Treasury standardizes its regular bill auction cycle so that 4-week, 8-week, 13-week, 17-week, 26-week, and 52-week bills issue and mature on Thursdays. This allows rolling ladders to seamlessly replace maturing debt on the exact settlement date with zero uninvested cash drag.

How does a Treasury bill differ from a standard coupon bond?

Treasury bills do not pay periodic interest coupons. Instead, they are sold at a discount to their face value (par) and mature at full face value ($100 or $1,000). The return to the investor is the difference between the discount purchase price and the par value received at maturity.

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Treasury Bill Ladder Builder & Cash Roll Simulator

Construct deterministic rolling liquidity ladders across 4-week, 8-week, 13-week, 26-week, and 52-week U.S. Treasury bills. Models continuous cash liquidation schedules, reinvestment yield retention under shifting yield curves, and exact state tax savings under 31 U.S.C. § 3124. Engineered with live Tier-1 U.S. Treasury benchmark yields.

Live Sovereign Benchmark Telemetry • U.S. Treasury Constant Maturities

Ingesting Tier-1 Treasury Feeds

4-Week T-Bill

3.82%

8-Week T-Bill

3.80%

13-Week T-Bill

3.81%

26-Week T-Bill

3.75%

52-Week T-Bill

3.65%

Interactive Ladder Sizing & Cash Flow Engine

Select a preset rolling structure or customize capital tranches to calculate continuous cash liquidity events.

Live Deterministic Model

Total Capital Allocation ($)

Ladder Structure Preset

4 tranches of equal capital. 25% of your portfolio matures every 7 days, providing continuous weekly cash liquidity.

State Tax Jurisdiction (31 U.S.C. § 3124)

Federal Marginal Bracket

Blended Portfolio Yield (BEY)

3.82%

Weighted Bond-Equivalent Yield

Total Annual Interest Income

$3,820

Net dollar earnings at maturity

Liquidity per Maturity Event

$25,000

Liquid cash unlocked every 7 days

State Tax Shield Savings

$508

Annual savings vs commercial CD

Statutory State Tax Shield • 31 U.S.C. § 3124 Immunity

Treasury bills are 100% exempt from all state and local income taxes. For an investor in California (13.3%), a taxable commercial bank CD or High-Yield Savings Account (HYSA) would need to pay a pre-tax interest rate of 4.41% to match the take-home return of this Treasury ladder.

4.41%

Tax-Equivalent Yield (TEY)

Forward Reinvestment Rate Shift Simulation +0 bps (Current Yield)

-150 bps (Fed Cuts) +150 bps (Fed Hikes)

As tranches mature and roll forward, testing a rate shift models future portfolio cash flow adjustments under changing monetary policy regimes.

Tranche Schedule & Cash Liquidation Timeline

4 Active Tranches

Rung #	Tenor	Allocation ($)	Discount Yield	Purchase Price ($)	Maturity Settlement	Maturing Cash (Par)	Net Interest ($)	Bond-Equiv Yield

Multi-State After-Tax Net Return Comparator

Net Take-Home Cash on $100,000 Portfolio

Jurisdiction	State Tax Rate	Treasury Ladder (State Exempt)	Commercial Bank CD (Fully Taxed)	Treasury Advantage ($)	Required CD Breakeven (TEY)

Institutional Mathematical Proof & Mechanics

U.S. Treasury bills do not pay periodic interest coupons. They are issued at a discount to face value (par = $100) and mature at full face value. The return earned by the investor is strictly the discount captured at maturity.

1. Discount Rate to Price Formula:
Price (P) = 100 × [ 1 - (Discount Rate × Days to Maturity / 360) ]

2. Investment Rate (Bond-Equivalent Yield, BEY):
BEY = [ (100 - Price) / Price ] × (365 / Days to Maturity)

3. Tax-Equivalent Yield (TEY):
TEY = BEY / (1 - State Marginal Tax Rate)

Why Thursdays Matter: The Department of the Treasury standardizes regular weekly bill settlement on Thursdays. When a 4-week, 13-week, or 26-week bill matures on a Thursday, newly auctioned replacement bills settle on that exact same day. This guarantees that an automated rolling ladder operates with zero days of uninvested cash drag.

Frequently Asked Questions

How does a Treasury bill ladder protect against interest rate risk? +

Can I build a Treasury bill ladder in a standard brokerage account? +

How does holding physical T-Bills compare to a Treasury ETF like $SGOV? +