Free calculators built on the IRS Partner’s Basis Worksheet. The calculators run in your browser, and the free tier needs no signup.
Your IRS-adjusted basis from real K-1 box values, year by year.
20-year basis erosion, §751 recapture, and sell-vs-hold break-evens.
Standard projections for EPD, ET, MPLX, WES, PAA, NRP, USAC, and SUN.
Per-ticker sell-vs-hold answers with a comparable hold-vs-sell multiple.
The same engine, callable from Claude, any MCP client, or plain HTTPS.
Need basis rebuilt for a private partnership K-1? See Private Partnership Basis Reconstruction.