Type a physician's WPI and get the full DEU-style rating string, combined PD, and the dollars — occupational variant, age adjustment, apportionment, and the Combined Values Chart all handled, with the audit trail shown. Covers SB 863 (2013+) and the 2005–2012 FEC era, with rate caps for every injury year through 2026. Verified against the DIR's published worked examples. Free, no login. Pro adds a claim library, settlement tools (life pension, commutation), and court-ready exhibits.

Hi Product Hunt 👋 RateString started with a simple observation: every California workers'-comp PD rating is the same mechanical walk through the 2005 PDRS — WPI, the 1.4 modifier, occupational variant, age adjustment, apportionment, the Combined Values Chart — and yet most of it still gets done with paper charts and lookup tables. So we made it instant. Type the WPI and the full DEU-style rating string assembles live, with the combined PD and the dollars: indemnity by injury-year rate caps, life pension for 70%+ ratings, commuted value at 3%. Every step shows its work, because in comp, a number you can't defend is worthless. The part we're proudest of: the engine reproduces the DIR's own published worked examples end-to-end, and the PDRS tables were audited cell-by-cell — 5,085 occupational-variant cells, the 1,000-cell age table, the FEC grid. The core calculator is free, no login: ratestring.com/calc A sample court-ready exhibit: ratestring.com/demo We'd genuinely value feedback — especially from anyone who's ever rated a case the hard way.

One thing that would save me a lot of time is letting me paste an entire earnings record (like a text dump from a payroll report) and have RateString auto-detect the dates, wages, and any concurrent earnings across multiple employers. Right now I still have to manually format each row before I get the WPI, which is the most tedious part of the workflow.

the fact that you verified it against the DIR's worked examples is honestly the detail that sold me, that kind of rigor is rare in a free tool

RateString

California PD ratings in under a minute

California PD ratings in under a minute