Official Deadline Calendar: two Acme entities and one patent family, 5 Oct 2026 edition
Assumed interpretation: no official record matches "Acme Ltd 01234567" (the Companies House page returned 404), so every Acme Ltd date is computed from your profile (FYE 31 March, quarterly VAT) and marked estimated. Acme Inc is assumed to be a calendar-year US C corporation with an extension on file, an employer, and not a Delaware foreign filer. Due-soon window: 2026-10-05 to 2026-11-04. The patent family has no governing authority among those listed.
Summary: 12 dated deadlines across 3 items; 4 due soon; 0 rule changes found in window; 1 item not found at its registry.
| Due date | Item | Deadline | Authority | Basis/source link | Status | Action needed |
|---|---|---|---|---|---|---|
| 2026-10-15 | Acme Inc (Delaware corporation) | Form 1120 on extension (calendar-year filer) | IRS | IRS fourth quarter calendar lists calendar-year Form 1120 on 15 Oct for filers who timely requested a 6-month extension; assumes a calendar year and a filed extension. | due soon, estimated | Confirm tax year and extension, then file |
| 2026-10-15 | Acme Inc (Delaware corporation) | Monthly-depositor payroll tax deposit for September | IRS | IRS fourth quarter calendar and monthly deposit rule | due soon, estimated | Confirm deposit schedule, deposit |
| 2026-10-22 | Acme Ltd (UK company 01234567) | PAYE and National Insurance for tax month ending 5 October | HMRC | Pay employers' PAYE: 22nd of the next tax month if paying monthly. 22 Oct 2026 is a Thursday, no roll needed. | due soon, estimated | Confirm Acme Ltd is an employer, pay |
| 2026-11-02 | Acme Inc (Delaware corporation) | Form 941 for Q3 2026, and FUTA deposit if over threshold | IRS | IRS fourth quarter calendar lists 2 Nov; 31 Oct falls on a Saturday, so Monday 2 Nov. | due soon, estimated | File 941, check FUTA liability (the calendar lists a deposit if more than $500) |
| 2026-11-07 | Acme Ltd (UK company 01234567) | VAT return and payment, quarter ended 30 Sep 2026 | HMRC | Submit a VAT return: 1 month + 7 days after period end = 7 Nov (Saturday). The page says payment must reach HMRC by the deadline even on a weekend, so aim for Fri 6 Nov. | upcoming, estimated | Confirm VAT stagger, file and pay |
| 2026-11-16 | Acme Inc (Delaware corporation) | Monthly-depositor payroll tax deposit for October | IRS | IRS employment tax due dates: 15 Nov is a Sunday, so Monday 16 Nov (inferred from the next-business-day rule). | upcoming, estimated | Deposit |
| 2026-12-01 | Acme Inc (Delaware corporation) | Delaware estimated franchise tax, 3rd installment (20%) | Delaware Division of Corporations | Delaware estimated tax instructions; applies only if prior-year tax was $5,000 or more. | upcoming, estimated | Confirm prior-year tax, pay if required |
| 2026-12-31 | Acme Ltd (UK company 01234567) | Annual accounts for FYE 31 Mar 2026 | Companies House | Prepare and file annual accounts: 9 months after year end = 31 Dec 2026. | upcoming, estimated | Approve and file accounts |
| 2026-12-31 | Acme Ltd (UK company 01234567) | Corporation tax payment, year to 31 Mar 2026 | HMRC | Pay corporation tax: 9 months + 1 day = 1 Jan 2027, a bank holiday, so HMRC's weekend and holiday rule brings it back to 31 Dec 2026. | upcoming, estimated | Pay corporation tax |
| 2027-03-01 | Acme Inc (Delaware corporation) | Delaware annual report and franchise tax | Delaware Division of Corporations | Delaware pay taxes page: domestic corporations due 1 March. | upcoming | File annual report and pay tax |
| 2027-03-31 | Acme Ltd (UK company 01234567) | Company Tax Return CT600 | HMRC | Accounts and tax returns guide: 12 months after period end = 31 Mar 2027. | upcoming, estimated | File CT600 |
| Not dated | Acme Ltd (UK company 01234567) | Confirmation statement | Companies House | Confirmation statement service gives no due-date rule, and the company record was not found. | not found | Look up the next statement date on the register |
| Not dated | US patent family 'Widget sensor' | Patent maintenance and license renewals | None of the listed authorities | USPTO is not in your authority list. No in-scope deadline. | not found | Supply grant dates and add USPTO if wanted |
Rule changes
None found in window (28 Sep to 5 Oct 2026). I did not find a dated change on the pages fetched; the IRS Form 1120 page shows its last update as 19 Aug 2026 (About Form 1120), and the IRS fourth-quarter calendar shows 1 Sep 2026 (IRS fourth quarter calendar).
Notes
- Acme Ltd: the Companies House company page for 01234567 returned 404, so no registry data replaced the computed dates. I used no same-name record.
- VAT: the stagger is unknown. I assumed periods ending 30 Sep, 31 Dec, 31 Mar and 30 Jun.
- Form 1120: the 15 Oct date applies only to a calendar-year filer with an extension. A non-calendar year changes it.
- Patent: the USPTO maintenance-fee windows fall at 3 to 3.5, 7 to 7.5 and 11 to 11.5 years after grant (MPEP 2506). This is a lead only, outside your listed authorities.
Do next
- Confirm Acme Inc's tax year and extension, then file Form 1120 by 15 Oct.
- Confirm Acme Inc's payroll deposit schedule before the 15 Oct deposit.
- Confirm Acme Ltd is a PAYE employer before the 22 Oct payment.
- Provide the real Companies House number so the register can be checked.
- Supply the patent grant date if USPTO tracking is wanted.
Open items
- Acme Ltd VAT stagger, PAYE status and confirmation statement date.
- Acme Inc fiscal year end, Delaware prior-year tax size and any foreign qualification.
- Patent grant date and authority scope.
Coverage
Companies House company register (404) could not be reached for record 01234567. No dedicated rule-change searches beyond the pages listed below were run.
Sources
- Prepare and file annual accounts, accessed 2026-10-05, no date shown.
- Pay corporation tax, accessed 2026-10-05, no date shown.
- Submit a VAT return, accessed 2026-10-05, no date shown.
- Pay employers' PAYE, accessed 2026-10-05, no date shown.
- File your confirmation statement, accessed 2026-10-05, no date shown.
- Delaware pay taxes, accessed 2026-10-05, no date shown.
- Delaware estimated tax instructions, accessed 2026-10-05, no date shown.
- IRS employment tax due dates, last reviewed 21 Apr 2026, accessed 2026-10-05.
- IRS tax calendar, updated 27 Jun 2026, accessed 2026-10-05.
- IRS fourth quarter tax calendar, updated 1 Sep 2026, accessed 2026-10-05.
- About Form 1120, updated 19 Aug 2026, accessed 2026-10-05.
- USPTO MPEP 2506, last modified 9 Mar 2026, accessed 2026-10-05.