Treasury Calculator

Model your return on US Treasury bills, notes, and bonds. State tax-exempt. Pre-filled with live FRED yields.

You're modeling what you'd actually earn on a US Treasury — bills (<1 year), notes (2–10 years), or bonds (30 years). Treasuries are the risk-free baseline every other investment is measured against: if a stock can't beat the Treasury yield over time, why take the extra risk? They're also state-tax-exempt, which matters if you're in a high state-tax state like California or New York. Duration tells you how sensitive the price is to interest rate changes — longer duration means bigger price swings when rates move.

Investment Amount

Federal Tax Bracket

Inflation Assumption

% (10Y TIPS breakeven)

Return Comparison

Fetching live yields…

Maturity	Yield	Annual Income	Total over Term	After-Tax / yr	Real Return / yr	Duration Risk	If Rates +1%
3 Month Bill BILL · Buy at discount · no coupon	% FRED live	$400 per year	$100 this period	$304 after 24% federal	+1.50% $150/yr after 2.5% inflation	None mod dur 0.25y	—
2 Year Note NOTE · Semi-annual coupons · 2y term	% FRED live	$400 per year	$800 over 2y	$304 after 24% federal	+1.50% $150/yr after 2.5% inflation	Low mod dur 1.9y	-$186 mark-to-market loss if sold
10 Year Bond BOND · Semi-annual coupons · 10y term	% FRED live	$450 per year	$4,500 over 10y	$342 after 24% federal	+2.00% $200/yr after 2.5% inflation	High mod dur 8.1y	-$792 mark-to-market loss if sold
30 Year Bond BOND · Semi-annual coupons · 30y term	% FRED live	$500 per year	$15,000 over 30y	$380 after 24% federal	+2.50% $250/yr after 2.5% inflation	Very High mod dur 16.5y	-$1,610 mark-to-market loss if sold

T-Bills (≤ 1 year) — How it works

· No coupon. You buy below face value and get face back at maturity.· Zero duration risk — rates can move and you don't care. You're out in 90 days.· State and local tax exempt (federal still applies).· Buy at auction (every Monday for 3M) or secondary market via your broker.· Rolling every 90 days means your yield resets to whatever rate is current — no lock-in.

Bonds (2Y+) — Duration Risk

· You lock in the coupon yield for the full term.· If rates rise, bond price falls — "If rates +1%" column shows your mark-to-market loss if you sell early.· Hold to maturity and the loss disappears — you get face value + all coupons.· The 30Y locks in 5.12% for 30 years — great if rates fall, painful if inflation returns.· Coupons are reinvested at whatever rate is current — reinvestment risk.