DayFig publishes its calculator model inputs as open datasets so answer engines and researchers can quote accurately. This page records what changed and when each dataset was last refreshed. Open datasets are released under CC BY 4.0 — attribute “DayFig (dayfig.com)”.
Released oconus-rates-2026.json (DoD Bulletin 331, 9 non-foreign territories, season-adjusted) and zip-lookup.json (42,358 ZIPs → GSA destination). Added to the open dataset pack (CC BY 4.0) and linked from llms.txt / llms-full.txt.
per-diem-2026.json updated to GSA Per Diem Bulletin FTR 26-01 (Oct 1 2025 – Sep 30 2026): standard $178/day plus all 298 non-standard areas with monthly lodging caps and M&IE tiers.
Published a machine-readable companion covering what DayFig is, the national per diem baseline, OCONUS baselines, the open datasets, key tools, and the compliance note.
Trip calculator (75% first/last-day rule), ZIP lookup (42,358 ZIPs), travel-policy generator, and CA/NY state hubs went live alongside the per-diem hub.
A focused set of free calculators and guides across related topics — no account required.