Official sources
Our rate tables and calculation rules come from official government sources. This directory lists the official publishers for each tool.
Published data includes GSA FY2026–FY2027 per diem, VA 2026 compensation, and GI Bill 2026–2027 rates. Each data page identifies sources and dates. BAH, basic pay, BAS, and PCS source downloads are blocked in this environment; those tools accept amounts you verify with the official publisher.
| Dataset / period | Effective from | Last updated | Official sources |
|---|---|---|---|
| per-diem · FY2026 | Oct 1, 2025 | Oct 7, 2026 | |
| per-diem · FY2027 | Oct 1, 2026 | Oct 7, 2026 | |
| va-compensation · 2026 | Dec 1, 2025 | Oct 7, 2026 | |
| gi-bill · 2026-2027 | Aug 1, 2026 | Oct 7, 2026 | |
| retirement · current-rules | Jan 1, 2018 | Oct 7, 2026 |
| Dataset | Official publisher | Update schedule |
|---|---|---|
| CONUS per diem | GSA | Fiscal year beginning October 1 |
| Basic Allowance for Housing | Department of Defense | January 1 |
| Military basic pay | DFAS | January 1 |
| Basic Allowance for Subsistence | Department of Defense | January 1 |
| VA disability compensation | Department of Veterans Affairs | December 1 |
| Combined ratings & bilateral factor | eCFR · 38 CFR 4.25 and 4.26 | When the regulation changes |
| PCS travel allowances | Defense Travel Management Office | January 1; check current JTR |
| Federal income tax | IRS | Annually |
| Social Security wage base | Social Security Administration | January 1 |
| Post-9/11 GI Bill benefits | Department of Veterans Affairs | August 1 |