Late GST Return in Alberta: Penalties, Interest, and Next Steps
What an Alberta GST/HST registrant should do after missing a return or payment deadline, including the current CRA penalty formula and a recovery checklist.
Quick answer
What Calgary business owners should know
- File an overdue GST/HST return as soon as accurate records can be assembled, even when the full balance cannot be paid immediately.
- The current late-filing penalty is 1% of the amount owing plus 25% of that 1% for each complete month late, to a maximum of 12 months.
- CRA generally does not charge that late-filing penalty when the return has no amount owing or produces a refund, but the return is still required and an ignored demand to file can add a separate penalty.
- Interest can accrue on an overdue balance from the payment due date, so filing, paying, and arranging a payment plan are separate decisions.
First identify what is actually late
A GST/HST problem can involve a missing return, an unpaid filed balance, an insufficient instalment, a return filed using the wrong account or period, or a payment that CRA has not allocated correctly. Sign in to the business's CRA account and list every outstanding reporting period, expected return, assessment, payment, credit, and notice. Compare that list with the bookkeeping and bank records before submitting duplicates.
Filing and payment have separate deadlines in some annual-filer situations. Confirm the due date for the actual registrant and reporting period rather than relying on a generic calendar. Monthly and quarterly filers generally file and pay one month after the end of the period. An annual registrant's deadlines depend on the entity, fiscal year-end, and individual business-income circumstances.
How the current late-filing penalty works
When a return is filed late and has an amount owing, CRA's current formula is A plus B multiplied by C. A is 1% of the amount owing. B is 25% of A. C is the number of complete months the return is overdue, to a maximum of 12. For example, this is not simply a flat monthly interest rate; the penalty is calculated from the balance owing and the number of complete overdue months.
CRA states that it does not charge this late-filing penalty when the return has zero owing or CRA owes a refund. That does not make the return optional. If CRA issues a demand to file and the registrant does not comply, a $250 penalty can apply in addition to other consequences. Interest can also apply to overdue payments and insufficient instalments at rates that CRA updates quarterly.
| Priority | Action | Reason |
|---|---|---|
| 1 | Verify account, period, due date, notices, and existing payments | Avoid duplicate or misapplied filings and payments |
| 2 | Reconcile sales, tax collected, ITCs, and adjustments | File a supportable return rather than an unsupported estimate |
| 3 | Submit the overdue return electronically where required | Stops the return from remaining outstanding |
| 4 | Pay what can be paid to the correct account and period | Reduces the balance on which interest may continue |
| 5 | Contact CRA about an unpayable balance or disputed assessment | Payment arrangements, disputes, and relief requests use different processes |
| 6 | Correct the bookkeeping and future calendar | Prevents the same period from remaining wrong after filing |
File accurately even when cash is tight
Do not delay filing solely because the business cannot pay the full balance. Complete the sales and ITC reconciliation, file the return, pay an amount the business can support, and contact CRA through an official channel about the remaining debt. A payment arrangement does not erase interest, but leaving both the return and balance unresolved generally gives the business less certainty.
If records are incomplete, reconstruct the period from sales systems, invoices, bank and card statements, payment processors, contracts, and supplier documents. Mark unsupported items for follow-up. Do not invent invoices or claim ITCs from a bank transaction alone when the required tax evidence is missing. If a filed return is later found to be wrong, use the CRA adjustment process rather than filing a second original return for the same period.
Practical checklist
- Preserve every CRA notice and record its response deadline.
- Keep the filed return, confirmation, payment proof, and reconciliation together.
- Check the assessment after filing and investigate CRA adjustments.
- Request relief only where the facts meet CRA's relief criteria; it is not automatic.
- Add future filing, instalment, and payment dates to one controlled calendar.
Know when the issue needs professional review
Obtain advice promptly when several periods are missing, CRA has issued a demand or assessment, sales records do not reconcile, the business claimed unsupported ITCs, directors may face trust-account exposure, or the business cannot pay. The response depends on the account history and records, not only the number of days late.
- Is there a late-filing penalty when an overdue GST return shows no balance owing?
CRA currently says it will not charge the ordinary late-filing penalty when the return has zero owing or produces a refund. The return is still required, and a separate penalty can apply if a demand to file is ignored.
Review coordinated corporate tax and GST/HST support
Official sources
This guide was prepared from the official sources below. Open them to verify the current rule and review exceptions relevant to your situation.
