United States · Rates and limits
U.S. rates history hub.
The prime rate, fed funds, I bond, IRS mileage and Social Security wage-base numbers people look up most — each with every past value, a CSV and the source.
Five official U.S. numbers, all current as of October 1, 2026: prime 7.00%, fed funds 3.75–4.00%, I bond 4.26%, IRS business mileage 76 cents, Social Security taxable maximum $184,500.
Today’s numbers
Plain-language explainer
Each page below lists every change in full, lets you look up the value for a date or amount, and downloads as CSV. Numbers come only from the Federal Reserve, FRED, TreasuryDirect, the IRS and the Social Security Administration. If a figure could not be checked against one of those, it is left out rather than guessed.
- Prime rate history — 366 levels since 1955.
- FOMC dates and fed funds history — 2026–2027 calendar and 186 target changes.
- I bond rate history — 57 announcements since 1998.
- IRS mileage rate history — 19 periods since 2011.
- Social Security taxable maximum — every year since 1937.
Cite this page
TNAADO Tools. "U.S. Rates History Hub." https://tools.tnaado.ca/us/rates-history.html Data as of 2026-10-01. Source: Federal Reserve, FRED, TreasuryDirect, IRS, SSA.
Sources: FRED DPRIME, Federal Reserve FOMC calendars, TreasuryDirect I bond rates, IRS standard mileage rates, SSA contribution and benefit base.
Frequently asked questions
Where do these numbers come from?
Directly from the Federal Reserve and FRED, TreasuryDirect, the IRS and the Social Security Administration. Each page links its exact source and shows the date the data was downloaded.
How often is it updated?
Each page shows its as-of date. Rates change on known dates: FOMC meetings, May 1 and November 1 for I bonds, January 1 (and sometimes July 1) for IRS mileage, and October to November for the Social Security wage base.
Can I reuse the data?
The figures are U.S. government data. The CSV downloads are free to use; please keep the citation line from each page.
Why is a number missing?
If a value could not be verified from a primary source, it is left out and the page says so.
Reference data, not advice
Figures are copied from the primary sources linked above as of October 1, 2026. Always confirm against the source before relying on a number for a filing, contract or loan.