Paid plans monitor:CHVATCorp TaxRTIP11DSelf AssessmentMTD ITSAPensionCharityECCTA
Free
£0
For small practices getting started
5 companies
- 5 companies monitored
- Companies House & ECCTA alerts
- 30/14/7-day advance warnings
- Overdue-day alerts
- No card required
- VAT, CT, payroll, SA, MTD ITSA alerts
- Pension auto-enrolment alerts
- Priority 07:00 delivery
Most popular
Starter
£29/mo
For solo accountants and bookkeepers
Up to 50 companies
- Up to 50 companies
- 9 UK filing regimes (CH, VAT, CT, RTI, P11D, SA, MTD ITSA, Charity, ECCTA)
- 30/14/7-day + due-date alerts
- 09:00 morning delivery
- Monthly digest
- 30-day free trial included
- Pension auto-enrolment alerts
- Priority 07:00 delivery
- Second alert recipient
Pro
£39/mo
For growing practices with large portfolios
Unlimited companies
- Unlimited companies
- All 10 UK filing regimes
- Pension auto-enrolment alerts
- 30/14/7-day + due-date alerts
- Priority 07:00 delivery
- Second alert recipient
- Weekly digest
- 30-day free trial included
Practice
£79/mo
+£19/seat/mo above 3
For multi-partner practices and teams
Unlimited companies
- 3 seats included
- Unlimited companies
- All 10 UK filing regimes
- Pension auto-enrolment alerts
- Priority 07:00 delivery
- Team logins + audit trail (at launch)
- White-label client alerts (at launch)
- Dedicated onboarding call
Questions? Email hello@penaltyproof.co.uk · Already a customer? Send me a manage link →
We store your email address and the company numbers you choose to monitor. No client financial data, no HMRC access, no accounting software integration. Privacy policy · Terms
8 questions answered
Common questions
Everything accountants typically ask before signing up.
We monitor 10 UK filing regimes: Companies House (annual accounts, confirmation statements), Corporation Tax, VAT returns, RTI payroll, P11D, Self Assessment, MTD ITSA, pension auto-enrolment, Charity Commission annual returns, and ECCTA identity-verification deadlines.
Companies House's free service covers two filings — accounts and confirmation statement — with a reminder a few weeks before each, set up per company. PenaltyProof sends 30, 14, 7-day and due-date alerts across every regime for your entire client list from one signup.
No. PenaltyProof uses only publicly available Companies House data. We don't connect to HMRC, access your accounting software, or handle any client financials. That's a deliberate design decision — no sensitive data, no integration risk.
We store your email address, your account details, and the Companies House company numbers you choose to monitor. That's it. We access no client financial data, no tax records, no documents filed with HMRC. The company numbers you add are publicly registered at Companies House — they're not personal data. You don't need a data processing agreement with us to use PenaltyProof.
We check Companies House daily. When a filing is received, the deadline for that obligation is cleared automatically — no action needed from you. The next year's deadline is tracked immediately.
Yes. You can paste a list of company numbers, names, or upload a CSV. We validate each one against Companies House, deduplicate, and begin monitoring — usually within seconds.Full guarantee terms →
If a client on your active paid plan receives a late-filing penalty for a deadline we failed to alert you about, we credit your account the full penalty amount — up to 12 months of subscription fees. The company must have been added at least 35 days before the filing date. Full terms at penaltyproof.co.uk/terms.
Yes. The free plan monitors up to 5 companies with full advance warning alerts for Companies House filings — no card required. Paid plans add HMRC obligations (VAT, CT, RTI, P11D, SA, MTD ITSA) and remove the company limit.
Our guarantee
The Penalty-Proof Promise
If we miss a deadline, we credit your account the full penalty amount.
No quibble. No drawn-out review. Verified within 5 business days.
£150–£1,500
CH penalty range
5 days
credit verified within
12 months
max credit cap
1
Penalty arrives
You receive the notice
2
Submit to us
Within 30 days, with copy
3
We credit you
Verified in 5 business days
If a client on your active paid plan receives a penalty for a deadline we failed to alert you about, we credit your account the full amount — up to 12 months of subscription fees. No quibble.
Full penalty creditedAdd clients 35+ days before deadlineVerified within 5 business days
Active paid plans only. Company must be added at least 35 days before the filing deadline. Credit applied to account balance; not redeemable as cash. Submit within 30 days of the penalty notice date with a copy attached. Full eligibility terms →
Guarantee in place from day one — no quibble
Questions? Email hello@penaltyproof.co.uk
Thornfield CS · 30d
Hartley VAT · 7d
Brackenwood CT · 14d
Marlowe VAT · Due today
Elmswood P11D · 30d
Fenwick & Co CT · 14d
Monitored 24/7 · Alerts every morning
Source: Companies House Annual Report 2024–25 · Official CH API data, updated daily
Stop tracking deadlines
manually. Start getting alerts.
Companies House issued 317,985 penalties to UK businesses last year —
most for filing late, all with advance notice possible.
30 days
earliest warning
10
filing regimes covered
£0
to try free (5 clients)
No credit card for free plan · Cancel paid plan any time during trial