#tax-deadlines
Important tax filing deadlines and compliance dates to remember
Learn what IRS Publication 15 (Circular E) requires for withholding, deposits, and filing Forms 941 and W-2. A clear, practical breakdown for small employers.
Wind and solar had to begin construction by July 4, 2026 — but a facility placed in service by December 31, 2027 still qualifies for 45Y/48E, a vacated IRS notice restored the 5% safe harbor, and storage, geothermal, and fuel cells remain eligible through 2033.
Only about 437,000 of the 864,000 UK sole traders and landlords in scope filed their first Making Tax Digital quarterly update by 7 August 2026 — close to half missed it. No penalty points apply this tax year, but HMRC begins forced enrolment in September 2026 and the next quarterly update is due 7 November 2026.
A small business owner's guide to filing Form 843 for COVID-era penalty refunds under the Kwong ruling, with step-by-step instructions and eligibility criteria before the July 10, 2026 deadline.
Bill C-15 makes bare trust reporting mandatory in Canada for tax years ending on or after December 31, 2026, with T3 and Schedule 15 filings due March 31, 2027. Covers which small-business arrangements count as bare trusts, the narrow $50,000/three-month exemption, and penalties up to 5% of trust property value.
Form T2125 turns a Canadian sole proprietor's invoices and receipts into taxable net business income on the T1 return. For 2026, gig platforms report earnings directly to the CRA, self-employed CPP totals nearly $9,300 at the earnings ceiling, and the June 15 filing extension still leaves payment due April 30.
Irish sole traders filing Form 11 in 2026 face a mid-year PRSI Class S rise from 4.2% to 4.35% on October 1, a €650 minimum PRSI charge, and the preliminary tax rule requiring 100% of prior-year or 90% of current-year liability by October 31 — with a ROS extension to mid-November for those who file and pay online.
Businesses that missed the July 4, 2026 begin-construction deadline can still claim the 30% Section 48E solar credit — but only if the system is placed in service by December 31, 2027, with no partial credit after. Covers the under-1 MW prevailing-wage exemption, domestic content and energy community adders, MACRS plus 100% bonus depreciation, selling the credit under Section 6418, and the 10-year FEOC clawback risk.
After Tropical Storm Arthur struck Louisiana on June 17, 2026, the IRS postponed federal tax deadlines to November 2, 2026 for Avoyelles, St. Landry, St. Tammany, and Terrebonne Parishes under FEMA declaration 4927-DR. The relief covers returns and estimated payments automatically — but not payroll tax deposits or 1099s — and a Section 165(i) election lets storm-damaged businesses claim casualty losses on last year's return.
The IRS pushed most federal tax deadlines for the May 16, 2025 St. Louis tornado (FEMA DR-4877) to November 3, 2025 — but the Section 165(i) election to deduct disaster losses on a 2024 return stays open until October 15, 2026, and penalty-free retirement withdrawals and SBA loans up to $2 million remain in play for affected businesses.
After Super Typhoon Sinlaku struck Saipan, Tinian, Rota, and the Northern Islands on April 11, 2026 (FEMA declaration DR-4910), the IRS postponed filing and payment deadlines falling between April 11 and November 2, 2026 to November 2 — automatically, for any taxpayer with an address of record in the CNMI. Here's what's covered, the April 27 payroll-deposit cutoff that already passed, and the Section 165(i) election that can put a refund in your hands by October 15.
The IRS postponed tax deadlines to August 20, 2026 for Honolulu, Maui, and Kauai counties after the March 2026 Kona Low storms — but Hawaii's separate Form L-115 state relief closes July 20, and SBA loan deadlines fall on August 13, 2026 (physical damage) and January 7, 2027 (EIDL). Here's who qualifies, what's automatic, and the casualty-loss election that can accelerate a refund.
