Tax & FilingsLive

Deadlines & Companies House Sync

Never miss a filing again — even ones you didn't know about.

Daily Companies House sync pulls your confirmation statement, accounts due and corporation tax deadlines automatically. Plus VAT, PAYE, payroll and custom deadlines. Configurable email reminders, completion tracking, and source attribution.

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
Try Deadlines & Companies House Sync Free

Free during Early Access — no credit card required

Everything Deadlines & Companies House Sync can do

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

VAT 9-box always live. File when you're ready.

Corporation Tax

See your CT bill in real time. Generate the workpaper for filing.

Payroll & RTI

Run payroll, send payslips, file RTI. No payroll bureau needed.

Financial Reports

P&L, Balance Sheet, Trial Balance, Cash Flow Forecast — instant, accurate, exportable.

Ready to try Deadlines & Companies House Sync?

Get started with AI-powered accounting for your UK limited company.

Get Started Free

Free during Early Access — no credit card — cancel anytime