Tax, HMRC & agent access
In short: Tax on company profits, reported on form CT600 within 12 months of the period end.
The CT600 return is due 12 months after the end of the accounting period, but payment is due earlier — normally nine months and a day after the period end for companies outside the instalment regime.
That gap between payment and filing dates is a frequent source of client confusion and unexpected interest.
Two different dates for one accounting period means two reminders, not one.
General information for UK practices, not legal, tax or regulatory advice. Rules change — check current GOV.UK guidance and your professional body before acting.
Start with the workflows that cause the most chasing, then bring leads, AML, proposals and clients into the same calm operating system.
Accounting firms run on deadlines: VAT returns, payroll, confirmation statements, accounts and Self Assessment. Recording every job as a task, with an owner and a date, is the simplest way to make sure nothing is missed.
HMRC and Companies House charge penalties for late filing. A task for every deadline, with an internal date before it, gives the team a buffer.
Recorded tasks mean work continues when someone is off sick, on leave or has left the firm.
Subtask checklists make every job follow the same steps and reviews, whoever does the work.
Filters by owner, status and deadline show at a glance what is late, what is due and who needs help.
Written and reviewed by Waqas Sagar ACA FCCA FMAAT, Chartered Accountant with 18+ years in practice. Founder and MD of Accotax, an ICAEW, ACCA and AAT regulated London practice that has served over 5,000 clients, and founder of Remindoo. Guidance is general; check current GOV.UK and professional body guidance for your firm.
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