Data downloads

The core series behind this site, as stable CSVs.

Stable URLs, plain CSV, rebuilt from the live Treasury APIs on the site's cadence (see About). Free to use and cite with a link to savingsbondcheck.com; the underlying data is US-government public domain.

savings-bond-redemption-values-current.csv

Current (September 2026) official redemption value for every savings bond cohort (series × issue year × issue month), per $25 of face value and scaled to a $50 bond, with earning status and final maturity. Source: Treasury Fiscal Data, Savings Bonds Value Files.

• series - EE, E, I, or SN (Savings Notes)
• issue_year - issue year printed on the bond
• issue_month - issue month (1–12)
• redemption_period - redemption month these values apply to (YYYY-MM)
• value_per_25_face_usd - official redemption value per $25 of face value
• value_50_face_usd - value of a $50 face-value bond (exact 2x scaling)
• status - earning / matured as of the redemption period
• final_maturity - month the bond stops/stopped earning (YYYY-MM)

savings-bond-redemption-values-full.csv

The full Treasury savings bond value file, 1992–present: per-$25 redemption values for every series, issue year, and issue month at every published redemption period. ~36k rows. Source: Treasury Fiscal Data, Savings Bonds Value Files (v2/accounting/od/sb_value).

• redemption_period - redemption month (YYYY-MM)
• series - EE, E, I, or SN
• issue_year - issue year
• value_jan_usd … value_dec_usd - redemption value per $25 face for bonds issued in that month; empty when no bonds were issued

savings-bonds-pieces-outstanding.csv

Monthly count of savings bonds issued, redeemed, outstanding, and matured-but-unredeemed, by series, from Treasury's savings bonds report (1998–present).

• record_date - statement month-end
• series - series code (E, EE, I, HH, SN, …; ALL = all series)
• bonds_issued - cumulative pieces issued
• bonds_redeemed - cumulative pieces redeemed
• bonds_outstanding - pieces still outstanding
• matured_unredeemed - pieces past final maturity, never cashed
• unmatured_unredeemed - pieces still earning, not cashed

i-bond-rate-history.csv

Every semiannual I bond rate period since September 1998: the fixed rate assigned to new issues, the semiannual inflation rate, and the composite rate for new issues. Source: Treasury Fiscal Data, I Bonds Interest Rates.

• period_start - first day the announced rates apply (YYYY-MM-DD)
• period_end - last day of the announcement period
• fixed_rate_new_issues_pct - lifetime fixed rate for bonds bought in this period (%)
• semiannual_inflation_rate_pct - semiannual inflation rate (%)
• composite_rate_new_issues_pct - annualized composite rate for new issues (%)

i-bond-rates-by-issue-month.csv

Every I bond issue month since September 1998 with its lifetime fixed rate and its combined rate under the May 2026 announcement (each bond adopts it at its own semiannual reset). Source: Treasury Fiscal Data, I Bonds Interest Rates.

• issue_year_month - issue cohort (YYYY-MM)
• fixed_rate_pct - lifetime fixed rate (%)
• combined_rate_2026_05_pct - combined rate under the May 2026 announcement (%)

ee-bond-final-maturity.csv

Series EE final-maturity schedule by issue year (30-year rule) with earning status as of the build date and the doubling-guarantee rule for the era. Source: TreasuryDirect EE bond pages.

• issue_year - calendar year of issue
• final_maturity_year - year the bond stops earning (issue month + 30 years)
• status - matured / maturing this year / earning, as of the build date
• guarantee_rule - original-maturity or doubling guarantee rule(s); pipe-separated when the year spans two eras

matured-unredeemed-savings-bonds.csv

Monthly total of matured, unredeemed US savings securities from the Monthly Statement of the Public Debt, Table III (2001–present).

• record_date - MSPD statement date (month end)
• matured_unredeemed_millions - matured unredeemed savings securities, $ millions