Help centre
Guides and answers for UK accountants using PenaltyProof to monitor client filing deadlines.
Getting started
How alerts work ›
How PenaltyProof checks deadlines, when alert emails are sent, and how duplicates are prevented.
Adding clients ›
How to add companies to your watch list — one by one, via CSV, or using the demo mode.
Plans and company limits ›
What each plan includes, company limits, and how the cumulative free limit works.
Alerts and regimes
Marking a filing as done ›
How to suppress remaining alerts for a deadline once you have filed.
iCal / calendar feeds ›
How to subscribe to your PenaltyProof deadline calendar in Google Calendar, Apple Calendar, or Outlook.
Secondary recipients (Pro and Practice) ›
How to add a second email address to receive alert copies — available on Pro and Practice plans.
What we monitor: Companies House annual accounts ›
How PenaltyProof monitors the annual accounts deadline and what alert stages fire.
What we monitor: Companies House confirmation statement ›
How PenaltyProof monitors the confirmation statement deadline and what alert stages fire.
What we monitor: VAT returns ›
How PenaltyProof derives VAT deadlines from the stagger group and what alert stages fire.
What we monitor: Corporation Tax ›
How PenaltyProof tracks both the CT600 filing deadline and the Corporation Tax payment deadline.
What we monitor: Self Assessment ›
How PenaltyProof monitors the 31 January, 31 July, and 5 October Self Assessment dates.
What we monitor: MTD ITSA quarterly updates ›
How PenaltyProof monitors the four fixed MTD ITSA quarterly update deadlines and the final declaration.
What we monitor: CIS monthly returns ›
How PenaltyProof monitors the monthly CIS 19th deadline for CIS contractors.
What we monitor: RTI (payroll FPS/EPS) ›
How PenaltyProof monitors the RTI FPS deadline derived from the payroll pay day setting.
What we monitor: P11D and Class 1A NIC ›
How PenaltyProof monitors the 6 July P11D deadline and the 22 July Class 1A NIC payment deadline.
What we monitor: pension auto-enrolment re-enrolment ›
How PenaltyProof monitors the three-year pension re-enrolment and re-declaration deadline.
What we monitor: ECCTA identity-verification and authorised-filer readiness ›
How PenaltyProof monitors ECCTA identity-verification and authorised-filer readiness dates for companies on your list.
What we monitor: Charity Commission annual return ›
Charity Commission annual return monitoring — currently rolling out; not yet active for all accounts.
Billing
Billing and invoices ›
How subscriptions, invoices, and Stripe billing work in PenaltyProof.
What happens when a payment fails ›
How PenaltyProof handles a failed Stripe payment and the steps before your plan reverts to Free.
Plan changes and proration ›
How upgrades, downgrades, and mid-cycle plan changes are handled in Stripe.
Account and data
Exporting your data ›
How to get a copy of the data PenaltyProof holds about your account and monitored companies.
Deleting your account ›
What happens when you delete your PenaltyProof account, and how the 90-day retention window works.
Feature status: what is live, gated, or in development ›
Honest status of each monitoring type — what is live for all accounts, what requires a flag, and what is still in development.
The PenaltyProof promise — what it covers and what it does not ›
What PenaltyProof commits to, the limits of the service, and how the alert system works in practice.
Email preferences and unsubscribing ›
How to manage alert emails, what you can and cannot unsubscribe from, and the difference between transactional and marketing emails.
Data, privacy, and GDPR ›
What data PenaltyProof stores, how it is used, and your rights under UK GDPR.