Manage GST/HST filings across cadences
A mixed book holds monthly, quarterly and annual GST/HST filers, and each cadence produces a different due-date pattern. One spreadsheet column cannot express three cadences, so firms track the loud monthly filers and lose the quiet annual ones. The annual filer forgotten in month eleven is the one that becomes a penalty conversation.
Firms manage GST/HST cadences in SpidNums by assigning each client a GST/HST service at its actual reporting frequency — monthly, quarterly or annual. Reminders then raises each filing on the client's own cadence and groups the feed into Overdue, Due soon and Upcoming, so a monthly filer's next period and an annual filer's single date sit in the same list.
How firms run it, step by step
Record each client's reporting period
Assign the GST/HST service at the frequency CRA actually has the client on. The cadence is data on the assignment, not a note in someone's head.
Services catalogue
Override the outliers
Keep one GST/HST service with a sensible default frequency and override per client, rather than maintaining three near-identical services.
Services catalogue
Work one grouped feed
All three cadences land in the same Reminders view, grouped Overdue, Due soon and Upcoming — the annual filers surface on schedule beside the monthly regulars.
Reminders
Close each period deliberately
Mark filings done, snooze what is legitimately waiting, dismiss what does not apply — so the feed stays a to-do list rather than a graveyard.
Reminders
Open a project where the chase is real
For clients whose filings need document collection and review, open the period's project with ordered tasks instead of tracking the chase in email.
Task Master
Services catalogue
Reminders
Task Master
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Frequently asked questions
When are GST/HST returns due?
Monthly and quarterly filers file one month after the reporting period ends. Annual filers file three months after fiscal year-end — except individuals with a December 31 year-end, who file by June 15 with payment due April 30. Deadlines falling on a weekend or holiday move to the next business day.
Where does the return actually get filed?
In your tax or accounting software, or through CRA's online services — SpidNums does not e-file. What SpidNums holds is the cadence: which clients file monthly, quarterly or annually, when each next period is due, and whether the work is marked done.
How do I handle a client whose reporting period changes?
Change the frequency on that client's GST/HST service assignment. Per-client overrides exist for exactly this: the catalogue default stays put, the one client CRA moved to monthly gets a monthly cadence, and the next-due date follows the new frequency.
See this workflow with your own client list in it.
A tailored demo walks the exact steps above with your services and deadlines.