A four-member LLC that files Form 1065 six months late owes about $6,240 in federal penalties before any state assessment. This 2026 guide details every federal and state penalty an LLC can face for non-filing, the cascade of secondary consequences, and the step-by-step path back to good standing — including how First-Time Abate can wipe out the entire federal penalty in a single phone call.
A 2026 calendar of LLC tax deadlines by IRS classification — single-member LLCs file Schedule C on April 15, multi-member partnerships and S-corps file Forms 1065 and 1120-S on March 16, C-corps file Form 1120 on April 15. Covers Form 7004 extensions, quarterly estimates, and the $245-per-partner late-filing penalty.
The IRS charges 5% per month for late filing (capped at 25%) plus 0.5% per month for late payment, with daily-compounding interest at 7% in Q1 2026. This guide details how each penalty is calculated and four programs — First-Time Abatement, reasonable cause, installment agreements, and Offer in Compromise — that can reduce or remove what you owe.
The IRS opens the 2026 filing season on January 26, with W-2s and most 1099s due by January 31. Filing early protects against refund fraud, speeds direct-deposit refunds within 21 days, and beats the April rush — but waiting can be smarter when K-1s or corrected brokerage 1099s are still in transit.
Form 1120 is the annual U.S. Corporation Income Tax Return every domestic C corporation must file, even in zero-income years. A 2026 walkthrough of deadlines, schedules C through M-2, estimated tax rules, and the eight most common filing mistakes.
A tax extension buys six months to file, not to pay. This guide explains exactly how to file Form 4868 (individuals) and Form 7004 (businesses), how to estimate a good-faith payment, and the state-level traps that cost filers real money.
Calendar-year partnerships must file Form 1065 and issue Schedule K-1s by March 16, 2026. Late filing costs $255 per partner per month, up to 12 months. This guide covers every federal deadline, Form 7004 extensions, quarterly estimates, and the Rev. Proc. 84-35 safe harbor for small partnerships.
Form W-9 collects a contractor's taxpayer ID at onboarding; Form 1099 reports year-end payments to the IRS. The 2026 filing threshold rises from $600 to $2,000 under the OBBBA, and missing a W-9 triggers 24% backup withholding immediately — plus penalties of up to $660 per late form.
A practical breakdown of what the IRS does when you skip a tax return—5% monthly failure-to-file penalty, Substitute for Return, liens, levies, passport revocation, and the step-by-step path back to compliance.
A step-by-step guide to filing late, halting penalties, and setting up IRS payment plans after missing April 15—covering the 5% monthly failure-to-file penalty, the 0.5% failure-to-pay penalty, interest at the short-term rate plus 3%, and the three-year window to claim a refund.
Take control of your finances with our open-source double-entry accounting system. Start your ledger today.
© 2019 - 2026 Beancount.io
