Treasury Yield Calculator

Calculate Treasury interest income, tax savings, and tax-equivalent yield for any maturity.

Investment Amount

Treasury Maturity

Current Yield (from TreasuryDirect)

Your State Income Tax Rate

How to Use This Calculator

1. Enter your investment amount.

2. Enter the current yield for your chosen maturity (check TreasuryDirect.gov or your brokerage for live rates).

3. Select the maturity and your state tax rate to see the tax advantage of Treasuries.

Tax advantage: Treasury interest is exempt from state and local income taxes — a meaningful benefit if you live in a high-tax state like CA, NY, or NJ.

Real-World Examples

$50,000 in 10-Year T-Note at 4.5%:
Annual interest: $2,250 | After 22% federal tax: $1,755/yr
Tax-equivalent yield vs savings account: 5.77%

$10,000 in 3-Month T-Bill at 5.25% (NY resident, 6.85% state):
State tax saved vs CD: ~$43/year — adds up on large balances.

Frequently Asked Questions

Where do I buy Treasuries?

Directly from the government at TreasuryDirect.gov (no fees), or through any major brokerage (Fidelity, Schwab, Vanguard) on the secondary market.

Are Treasuries safe?

US Treasuries are backed by the full faith and credit of the US government — considered the safest investment in the world. They carry essentially zero credit risk, only interest rate risk if you sell before maturity.

T-Bills vs T-Notes vs T-Bonds?

T-Bills: < 1 year, sold at discount. T-Notes: 2–10 years, pay semi-annual coupons. T-Bonds: 20–30 years, pay semi-annual coupons. All are exempt from state/local taxes.

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