What Happens If You Don't File GST/HST on Time?
HST you collect from customers is a trust fund that belongs to CRA. Late filing triggers penalties, daily compounding interest and personal liability for directors. Here is exactly what happens and how much it costs.
If you file your GST/HST return late in Canada, CRA charges a late filing penalty of 1% of the balance owing plus 0.25% for each full month the return is late, up to a maximum of 12 months (total maximum: 4% of the balance). CRA also charges interest on the unpaid net tax at the prescribed rate plus 4%, compounded daily from the day after the filing deadline. HST collected from customers is treated as a trust fund held on behalf of the government. Directors of a corporation are personally liable for unremitted HST. A business that owes $20,000 in net HST and files 6 months late pays $500 in penalties plus approximately $1,000 in interest. Repeated late filing triggers instalment requirements and increased CRA scrutiny. If you do not file at all, CRA can issue an arbitrary assessment, freeze your bank account and garnish your receivables without a court order.
GST/HST Late Filing Penalty: How CRA Calculates It
The GST/HST late filing penalty is different from the corporate income tax (T2) late filing penalty. The T2 penalty is 5% + 1%/month. The GST/HST penalty is lower at 1% + 0.25%/month, but it still adds up, and the real cost comes from the interest and the trust fund implications. The penalty applies when the return is filed after the deadline and there is a balance owing to CRA.
GST/HST Late Filing Penalty Calculation
| Component | Rate | Example: $20,000 Net Tax Owing |
|---|---|---|
| Base penalty | 1% of the net tax owing at the filing deadline | $200 |
| Monthly penalty | 0.25% of the net tax owing per full month late (max 12 months) | $50 per month |
| 3 months late | 1% + (3 x 0.25%) = 1.75% | $350 |
| 6 months late | 1% + (6 x 0.25%) = 2.50% | $500 |
| 12 months late (maximum) | 1% + (12 x 0.25%) = 4.00% | $800 |
Penalty by Amount Owing and Months Late
| Net Tax Owing | 3 Months Late | 6 Months Late | 12 Months Late | Interest (12 Months, approx) | Total Cost (12 Months) |
|---|---|---|---|---|---|
| $5,000 | $88 | $125 | $200 | $500 | $700 |
| $10,000 | $175 | $250 | $400 | $1,000 | $1,400 |
| $20,000 | $350 | $500 | $800 | $2,000 | $2,800 |
| $50,000 | $875 | $1,250 | $2,000 | $5,000 | $7,000 |
| $100,000 | $1,750 | $2,500 | $4,000 | $10,000 | $14,000 |
No Penalty If You Are in a Refund Position. The late filing penalty is calculated on net tax owing. If your ITCs exceed the HST you collected (common for exporters, zero-rated businesses and companies with large capital purchases), there is no penalty for late filing because no tax is owing. However, filing late delays your refund cheque. CRA does not send refunds until the return is filed. A business owed a $15,000 HST refund that files 3 months late simply delays the refund by 3 months. GST/HST Return Filing →
Late Payment Interest on GST/HST
| Component | Details |
|---|---|
| Interest rate | CRA prescribed rate + 4%. Updated quarterly by CRA. As of 2026, the combined rate is approximately 9% to 10% annualized. |
| Compounding | Daily compounding. Interest is calculated on the unpaid net tax plus any accumulated interest from the previous day. |
| Start date | The day after the filing and payment deadline (same date for GST/HST returns). Monthly filers: last day of the following month. Quarterly filers: last day of the month after the quarter. |
| Interest on penalties | CRA charges interest on the late filing penalty itself, compounded daily from the date the penalty is assessed. |
| Instalment interest | If you are required to pay quarterly instalments and miss an instalment, CRA charges interest at the prescribed rate + 4% from the instalment due date, not the return filing date. |
Interest Cannot Be Waived Under Normal Circumstances. Penalties can sometimes be reduced through the Taxpayer Relief Program, but CRA's position is that interest is the cost of owing money to the government and is not subject to cancellation except in cases where CRA caused processing delays or errors. Every day you owe HST, the debt grows.
GST/HST Filing Deadlines by Frequency
| Filing Frequency | Who Is Assigned This Frequency | Filing and Payment Deadline |
|---|---|---|
| Monthly | Annual taxable revenue above $6,000,000. Or voluntary election for faster refunds. | Last day of the month following the reporting month. January HST: due February 28. |
| Quarterly | Annual taxable revenue between $1,500,001 and $6,000,000. | Last day of the month following the quarter. Q1 (Jan-Mar): due April 30. Q2 (Apr-Jun): due July 31. Q3 (Jul-Sep): due October 31. Q4 (Oct-Dec): due January 31. |
| Annual (corporations) | Annual taxable revenue of $1,500,000 or less. | 3 months after the end of the fiscal year. Dec 31 year-end: due March 31. |
| Annual (individuals/partnerships) | Annual taxable revenue of $1,500,000 or less. Sole proprietors and partnerships. | June 15 for filing. April 30 for payment. Interest accrues from May 1 on any unpaid balance. |
Annual Filers with Quarterly Instalments
| Requirement | Details |
|---|---|
| When instalments are required | If your annual net tax (HST collected minus ITCs) exceeds $3,000 in the current or prior year, CRA requires quarterly instalment payments. |
| Instalment deadlines | Last day of each fiscal quarter. Q1: last day of month 3. Q2: last day of month 6. Q3: last day of month 9. Q4: last day of month 12. |
| Instalment amount | Each instalment: 25% of the prior year's net tax. Or 25% of the estimated current year net tax. |
| Penalty for missed instalments | Interest at prescribed rate + 4% on the late instalment amount from the instalment due date. |
Switch to Monthly Filing for Faster Refunds. If your business is in a consistent refund position (exporters, zero-rated SaaS, businesses with large ITCs), switch from quarterly or annual to monthly filing. Monthly filing produces monthly refund cheques from CRA instead of waiting 3 to 12 months. We recommend monthly filing for every business with significant zero-rated revenue. GST/HST Return Filing →
HST Is a Trust Fund: Why This Matters
HST you collect from customers does not belong to your business. It belongs to the government. You are holding it in trust until you remit it to CRA. This is not a technicality. The trust fund classification has three serious consequences that business owners must understand.
| Consequence | What It Means |
|---|---|
| Director personal liability | Directors of a corporation are personally liable for unremitted HST under section 323 of the Excise Tax Act. CRA can assess each director personally for the full amount of unremitted HST plus penalties and interest. CRA can pursue the directors' personal bank accounts, property and assets. The only defence is due diligence: proving the director took reasonable steps to ensure the HST would be remitted. |
| No discharge in bankruptcy | Trust fund debts (unremitted HST and payroll deductions) are not dischargeable in a personal bankruptcy of the director. Even if the corporation goes bankrupt and the director declares personal bankruptcy, the trust fund debt survives. |
| Priority claim for CRA | In a corporate insolvency, CRA's claim for unremitted trust funds ranks ahead of most other creditors including secured creditors. CRA recovers trust fund debts before the bank recovers on its operating line. |
| Criminal prosecution risk | Collecting HST and deliberately not remitting it can be prosecuted as fraud. CRA can refer cases to the RCMP for criminal investigation. This is separate from civil penalties and is most common in cases where the business collected HST for years without ever filing a return. |
Using Collected HST to Fund Operations Is the Most Dangerous Cash Flow Mistake. A business that collects $13,000/month in HST and uses it to cover payroll or rent instead of setting it aside for remittance is spending money that belongs to CRA. When the HST return is due, the cash is gone. The penalty and interest begin. CRA issues a Requirement to Pay. The directors are assessed personally. We see this pattern repeatedly and it is the #1 reason directors face personal liability assessments.
What CRA Does If You Do Not File GST/HST
| CRA Action | What Happens | When |
|---|---|---|
| Reminder notice | CRA sends a written reminder that the return is overdue. Not yet a formal demand. | 1 to 3 months after the missed deadline. |
| Demand to file | Formal written demand requiring you to file by a specific date. Ignoring a demand is an offence under the Excise Tax Act. | 3 to 6 months after the missed deadline. |
| Arbitrary assessment | CRA estimates your HST liability using T2 revenue data, bank records, supplier records and industry benchmarks. The estimate is typically higher than actual because CRA assumes maximum revenue and minimum ITCs. You owe the assessed amount plus penalties and interest. | 6 to 18 months. CRA does not need your permission. |
| Requirement to Pay (RTP) | CRA issues a legal demand to your bank, customers or anyone who owes you money to pay CRA directly. Your bank freezes your account and transfers the balance to CRA. Your customers pay CRA instead of you. No court order required. | After assessment and non-payment. Can happen within weeks of assessment. |
| Lien registration | CRA registers a lien against your real property (business or personal if a director assessment). The lien prevents sale or refinancing until the debt is paid. | After assessment. CRA can register without a court order. |
| Director liability assessment | CRA assesses each director personally for the full amount of unremitted HST plus penalties and interest. The director's personal assets, bank accounts and property are at risk. | After the corporation fails to pay. Can be issued simultaneously with the corporate assessment. |
Real Cost Calculations by Business Scenario
| Scenario | Net HST Owing | Months Late | Penalty | Interest (approx) | Total Extra Cost |
|---|---|---|---|---|---|
| Consultant, quarterly filer, minor delay | $4,000 | 2 | $60 | $67 | $127 |
| Restaurant, monthly filer, forgot one month | $8,000 | 1 | $80 | $67 | $147 |
| Construction company, quarterly, 6 months late | $25,000 | 6 | $625 | $1,250 | $1,875 |
| IT company, annual filer, 12 months late | $40,000 | 12 | $1,600 | $4,000 | $5,600 |
| Trucking company, never filed (2 years) | $80,000 | 24 | $3,200 (capped at 4%) | $16,000 | $19,200 |
| Retailer, arbitrary assessment (CRA estimate) | $60,000 (CRA est.) | 18 | $2,400 | $9,000 | $11,400 (on inflated amount) |
The Arbitrary Assessment Is the Real Danger. When CRA estimates your HST, they use maximum revenue assumptions and minimum ITC assumptions. A business that actually owes $30,000 may be assessed at $60,000 because CRA does not give you credit for ITCs you did not claim (because you did not file). You then owe $60,000 plus penalties and interest on the inflated amount. Filing the actual return reduces the assessment, but penalties and interest on the actual amount still apply. File late if you must. Never fail to file. GST/HST Return Filing →
How to Fix It If You Have Not Filed
| Situation | What to Do | Potential Outcome |
|---|---|---|
| Late but no CRA contact yet | File the return immediately. Remit any net tax owing with the return. The penalty and interest will be calculated on the outstanding balance. | Penalty and interest apply on the amount owing. No enforcement action. No arbitrary assessment. |
| CRA sent a demand to file | File within the deadline stated in the demand. Comply immediately. | Penalty and interest apply. Prosecution risk eliminated by complying. |
| CRA issued an arbitrary assessment | File the actual return as soon as possible. CRA reassesses based on the actual return, reducing the assessment to the correct net tax. Penalty and interest recalculated on the actual amount. | Assessment reduced. Penalties reduced. Interest reduced. May still be significant. |
| Multiple periods unfiled | File all outstanding returns. Consider a VDP application if the unfiled returns involve unreported revenue. VDP provides penalty relief and possible partial interest relief. | VDP: penalties waived. Interest reduced. No prosecution. Must apply before CRA contacts you. |
| Cannot afford to remit the HST | File the return anyway (even with a $0 payment). Then contact CRA to arrange a payment plan. Filing stops the arbitrary assessment risk and limits the late filing penalty. | Payment plan arranged. Interest continues but no new penalties. No Requirement to Pay while payments are current. |
| Penalty seems excessive | File a Taxpayer Relief Program (TRP) application requesting cancellation of penalties. CRA considers extraordinary circumstances, CRA errors and compliance history. | Penalties cancelled or reduced. Interest generally not waived. We have reduced GST/HST penalties by $2,000 to $15,000 for clients. |
We Handle Late and Unfiled GST/HST Returns. If you have one or more unfiled GST/HST returns, we prepare and file them. If CRA has issued a demand, arbitrary assessment or Requirement to Pay, we respond on your behalf, negotiate with CRA and apply for penalty relief. CRA audit defence is FREE for all existing clients. CRA Audit Resolution →
Special Situations for GST/HST Late Filing
| Situation | Penalty? | Interest? | What to Do |
|---|---|---|---|
| Return is late but you are owed a REFUND | No. Penalty is 0% because no net tax is owing. | No. CRA owes you money, not the other way around. | File to receive your refund. Every day you delay, you lose access to cash that is yours. |
| Filed on time but paid late | No late filing penalty (return was on time). | Yes. Interest from the day after the deadline on the unpaid balance. | Pay as soon as possible. Interest compounds daily. |
| Quick Method filer, late filing | Yes. 1% + 0.25%/month on the Quick Method net tax owing. | Yes. Same interest rate. | File immediately. Quick Method filers still owe net tax (the difference between HST collected and the Quick Method remittance rate). |
| Newly registered, first return late | Yes if net tax is owing. | Yes. | File immediately. Being new to HST is not a defence against penalties. CRA does not offer grace periods for first-time filers. |
| Closed the business but did not file final return | Yes if net tax is owing. | Yes. Plus: if you cancel your HST registration, you must self-assess HST on assets held at the date of cancellation. | File the final return. Self-assess on assets. Cancel the HST registration formally with CRA. GST/HST Filing → |
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