Per partner, per month, tax due or not — and a safe harbor most small partnerships qualify for without knowing it. Here's the math and the relief sequence in the right order.
IRC 6698 prices a late Form 1065 exactly like its S-corp twin: about $245 × partners × months, 12-month cap, due March 15, billed on a CP162. The difference is Rev Proc 84-35: small partnerships — ≤10 partners, all individuals, straight allocations, everyone's share timely reported personally — have a standing reasonable-cause safe harbor that predates and survives the modern audit regime for this purpose. Two-member LLCs filing as partnerships are its main beneficiaries and mostly don't know it exists.
Monthly meter; nothing moves until it's filed.
Qualify? One letter citing it, listing partners and their timely filings — penalty gone, FTA unspent.
Clean 3 years on the partnership account = near-automatic removal.
Illness, disaster, records — the standard grounds, with the standard documentation.
Every notice page explains the deadline and drafts the response letter free — find yours.
Look up your IRS notice →Same engine as the S corp version: about $245 (indexed) per partner per month or part-month, up to 12 months, assessed via CP162 — no tax due on the 1065 required.
A reasonable-cause safe harbor for small partnerships: 10 or fewer partners, all individuals (or estates of deceased partners), no special allocations, and every partner reported their share on timely-filed personal returns. Meet it and cite it — the penalty comes off for domestic partnerships that qualify.
Yes — 6698 is FTA-eligible on the partnership's own account. Strategy: use Rev Proc 84-35 if you qualify (it doesn't spend anything), and keep FTA in reserve for a year the safe harbor can't cover.
Late K-1s to partners are a separate per-form information penalty, but abating the 6698 charge is the money conversation. File complete — return plus K-1s — then request relief once.