Never miss a filing

Every deadline, synced straight from Companies House.

Confirmation statement, accounts, corporation tax, VAT and payroll dates, all pulled in daily and reminded on your terms.

Start free trialSee how it works

Free for 14 days, no credit card

accounts-os.com/deadlines
DeadlinesLive
What's due in the next 30 days?
FConfirmation statement due in 14 days, VAT return in 22. Both on track.
FFinn synced these straight from Companies House.
Live

In short

AccountsOS syncs filing deadlines from Companies House every day: confirmation statement, annual accounts and corporation tax. Add VAT, PAYE and custom deadlines too. Configurable email reminders, completion tracking and full source attribution (CH-synced vs user-created).

Daily
Sync
5+
Deadline types
Auto
Reminders

Everything it does

Companies House auto-sync

  • Confirmation statement deadline (annually)
  • Annual accounts due date
  • Corporation tax payment + filing deadlines
  • Daily cron resync
  • Manual sync button in Settings
  • Company lookup by company number
  • PSC and director deadline tracking on roadmap

Tax & payroll deadlines

  • VAT return + payment deadlines per quarter
  • PAYE / NI monthly payment deadlines
  • P11D, P60 deadlines
  • Self-assessment deadlines for directors
  • Custom deadlines for anything else (e.g. R&D claim)

Reminders

  • Email reminder cron
  • Configurable lead times (30, 14, 7, 1 day)
  • Mute reminders per deadline if you've delegated
  • Multi-recipient (you + your accountant)

Tracking

  • Mark as completed when filed
  • Source attribution (CH-synced / user-created / system-generated)
  • Audit trail of every deadline change
  • Calendar view (export to ICS)

Capabilities at a glance

Daily Companies House deadline sync

Confirmation statement, accounts, CT deadlines pulled automatically

VAT, PAYE, payroll, custom deadline support

Configurable email reminder lead times

Completion tracking with full audit

Source attribution (CH / manual / system)

Calendar view with ICS export

Multi-recipient reminders

How It Works

1

Connect Companies House

Enter your company number: we fetch your incorporation date, directors and all your filing deadlines instantly.

2

Sync continues daily

A cron job rechecks Companies House daily, so any change there appears here within 24 hours.

3

Configure reminders

Set your lead times (e.g. 30 / 14 / 7 / 1 day) and choose who gets notified.

4

File and tick off

Mark deadlines completed when filed. Audit trail captures everything.

By the numbers

CH
Live sync
Pulled fresh from Companies House daily
Email
Reminder cron
Configurable lead times
Audit
Source attribution
Know what was synced vs added

Real-world Use Cases

Newly-formed limited

Enter your CRN at signup; every Companies House deadline is in your calendar within seconds.

Forgot the confirmation statement

Reminder lands 30, 14, 7 and 1 day before. Snooze the deadline if you've delegated.

VAT quarter end

VAT deadline auto-created from your scheme. Reminder includes your live 9-box estimate.

Plays nicely with

Companies House API

Live

Live deadline sync.

Resend

Live

Email reminder delivery.

ICS calendar

Live

Subscribe from Google / Apple / Outlook calendar.

Why founders pick this over the spreadsheet

Never pay a late filing penalty (£150–£1,500 saved per occurrence)

Companies House always in sync: no risk of stale data

Configurable reminders so you can choose how much warning

Source attribution makes audit easy

Frequently Asked Questions

How often does Companies House sync?

Daily, via a 6 AM UTC cron. You can also manually sync from Settings any time.

What if my company isn't registered with Companies House (e.g. sole trader)?

You can add deadlines manually for any tax type. Sole traders typically need self-assessment + payment on account deadlines, which we support.

Can I add custom deadlines?

Yes. Anything from R&D claim deadlines to insurance renewals to internal milestones. Custom deadlines support the same reminders as system ones.

Will it remind my accountant too?

Yes. Multi-recipient reminders. Add your accountant's email and they get the same nudge.

What if a deadline date changes?

Companies House syncs daily, so any change there flows through within 24 hours. The audit log captures the change so you can see when and why it shifted.

Can I export to my calendar?

Yes. Subscribe to the ICS feed from any deadline page. Works with Google Calendar, Apple Calendar, Outlook and Fantastical.

Explore more of AccountsOS

Companies House Integration

Enter your company number once. We sync everything daily.

VAT & Making Tax Digital

Your VAT return builds itself with every transaction. File when you're ready.

Corporation Tax

See your tax bill in real time, so it's never a surprise. Filing-ready numbers when you need them.

Payroll

Run payroll, send payslips, and get an HMRC-ready RTI file every time. No payroll bureau needed.

Financial Reports

Profit, cash and what your company is worth, live. Proper statements underneath: P&L, Balance Sheet, Cash Flow.

Ready to try Deadlines & Compliance?

Set up in minutes. Finn works in the background on your books, wherever you're based.

Get Started Free

Free for 14 days, no credit card, cancel anytime