GST/HST Filing & Remittance Services in Ontario
(CRA) by filing your GST/HST return, claiming eligible Input Tax Credits (ITCs), and paying net tax by the due date.
Acctax prepares and files GST/HST returns for Ontario registrants, reconciles collected tax to source records, and gives you workpapers, filing confirmation, and a clear remittance amount. Acctax also supports first filings, catch-up periods, and correction work tied to Tax Preparation & Filing Services and Monthly Bookkeeping.
Ontario businesses in Kitchener, Waterloo, Cambridge, and across Ontario use Acctax when returns are due, records are messy, remittance amounts are unclear, or CRA letters start to pile up. Acctax keeps the process direct: reconcile the period, file the return, confirm the balance, and show the next step.
Book a consultation to review your reporting period, your GST/HST status, and your next filing deadline.
What we do: GST/HST returns, remittances, and compliance support
Acctax files GST/HST returns, supports remittances, and builds audit-ready records for Ontario registrants.
GST/HST return filing, monthly, quarterly, annual
GST/HST return filing means reporting tax collected, deducting eligible ITCs, and filing the return for the correct reporting period. Acctax prepares monthly, quarterly, and annual filings for incorporated businesses, self-employed operators, and platform sellers using Shopify, Square, Stripe, QuickBooks, or Xero.
Electronic filing now applies to most GST/HST registrants for reporting periods that begin in 2024 or later, except most charities and selected financial institutions. Paper filing can trigger a penalty when no exception applies. Acctax files through CRA-approved channels and keeps a copy of the filed return, the filing confirmation, and the period support behind the numbers.
Remittance planning, avoid surprises, and support cash flow
Remittance planning means knowing the net tax amount before the deadline hits. Acctax reconciles sales, tax codes, and ITCs before filing, so the balance owing or refund position is clear before you remit the GST/HST you collected.
Filing and payment are related, but they are not always identical in practice for annual filers. Acctax separates the filing task from the payment task, confirms the filing and payment deadline, and shows you what amount is due, what period it belongs to, and what records support it.
Catch-up filings for late or missed periods
Catch-up GST/HST filing fixes overdue periods, missed returns, and old balances before they create more interest, more notices, and more cleanup. Acctax rebuilds each missing period from sales reports, purchase records, bank activity, and prior filings, then prepares the return with workpapers that show how the figures were reached.
Late periods often expose bigger bookkeeping gaps. Acctax flags those gaps early and links the fix back to Bookkeeping & Accounting Services or CRA Audit Support & Representation when the file already involves notices, assessments, or review risk.
How GST/HST returns are filed, and what you need to file
GST/HST returns are filed through CRA-approved electronic channels, and accurate filing starts with complete records.
Can I file through My Business Account / Represent a Client?
My Business Account lets a business owner file a GST/HST return directly in a secure CRA account. Represent a Client lets an authorized accountant file in the same CRA environment on your behalf.
Acctax Approach: We use the CRA account route when direct account filing is the cleanest option. Acctax also checks account access, authorization status, reporting period selection, and prior return history before the filing starts.
What is GST/HST NETFILE, and when do I need an access code?
GST/HST NETFILE is the CRA’s online filing form for GST/HST returns. An access code is needed when you file through the standalone NETFILE form outside a CRA account.
Acctax Approach: My Business Account and Represent a Client do not require that standalone access-code step. Acctax checks the filing path first, then prepares the return to match that path so the return does not stall on a method issue.
What we collect from you includes sales reports, expense documents, and tax codes
Acctax collects the records that support GST/HST collected, ITCs claimed, and net tax reported.
| Record | Why it matters |
|---|---|
| Sales reports by period | Sales reports show taxable revenue, exempt revenue, and GST/ HST collected. |
| Purchase records and supplier invoices | Purchase records support eligible ITCs and documentary requirements. |
| Reconciled bank statements | Reconciled bank statements help match deposits, payouts, and reporting period totals. |
| Prior GST/HST returns | Prior returns show filing history, carry issues forward, and help spot missed periods. |
| GST/HST account number | GST/HST account details confirm the correct registrant and filing period. |
| Platform reports from Shopify, Square, or Stripe | Platform reports help map tax settings, fees, and payout timing. |
| Quick Method election, if any | Quick Method changes the net tax calculation and must be confirmed before filing. |
| CRA letters or statements of account | CRA notices help identify balances, missing returns, and correction needs. |
Deadlines: when GST/HST returns and payments are due
GST/HST deadlines depend on your reporting period, and monthly and quarterly deadlines usually fall 1 month after the period end.
Filing and payment deadline table
GST/HST filing works best when the due date is visible before the period closes. Acctax uses the table below to frame the deadline logic.
| Reporting period | Typical filing deadline | Typical payment deadline | Key note |
|---|---|---|---|
| Monthly | 1 month after the reporting period ends | Same day as filing deadline | Standard rule for most monthly registrants |
| Quarterly | 1 month after the reporting period ends | Same day as filing deadline | Standard rule for most quarterly registrants |
| Annual | Usually, 3 months after the fiscal year end | Usually, 3 months after the fiscal year end | Some individual annual filers with a Dec 31 year-end and business income get an April 30 payment deadline |
What if I miss the deadline?
Late GST/HST returns can trigger penalties, arrears interest, and CRA follow-up. Arrears interest is prescribed by CRA and compounded daily, so older balances usually become more expensive over time.
Missed deadlines usually create two problems at once: a filing problem and a records problem. Acctax fixes both by rebuilding the period, filing the return, confirming the balance, and documenting what was used to support the numbers.
We build a filing calendar for you
Acctax builds a filing calendar around your reporting period, your bookkeeping cycle, and your remittance dates. Acctax also ties that calendar to a practical document routine so sales reports, purchase records, and reconciliations arrive before the deadline, not after it.
Clear calendars matter because GST/HST is period-based, not memory-based. Acctax turns a deadline into a repeatable system with reminders, period close checks, and filing confirmation after submission.
Do you need to register for GST/HST?
GST/HST registration becomes mandatory when you stop being a small supplier, and voluntary registration can make sense before that point.
Small supplier threshold: when $30,000 triggers registration
The basic small supplier threshold is $30,000 in taxable revenue. The threshold can be crossed in one calendar quarter or over four consecutive calendar quarters.
Should you register voluntarily?
Voluntary registration allows you to recover GST/HST on startup or operating expenses through Input Tax Credits (ITCs) before hitting the $30,000 mark.
- Best for businesses with high taxable expenses.
- Not recommended for businesses making only exempt supplies.
- Requires strong bookkeeping readiness from day one.
Acctax reviews your expected ITCs and reporting burden before recommending early registration.
Maximize ITCs safely, without audit risk
Input tax credits reduce net tax when the claim is eligible, documented, and tied to commercial activity.
What ITCs are & Why Documentation Matters
ITCs let you recover GST/HST paid on eligible business purchases. CRA expects specific details on invoices to support the claim.
Records to keep & Retention Expectations
Records must be kept for 6 years. Acctax organizes your invoices, receipts, and platform reports into a period file that supports any later CRA review.
Related: What documents do I need to file taxes in Canada?
Common ITC Errors & Risks
Mixed-use (personal/business) expenses, missing invoices, and bad tax coding create audit risk.
Platform Note: For eCommerce, wrong mapping of fees and refunds can distort your return. We pair this review with Does Square report to the CRA? for sellers.
Ontario HST (13%) and place-of-supply rules for online and multi-province sellers
Ontario HST is 13% when Ontario is the place of supply, but another GST or HST rate can apply when the customer location or supply type points elsewhere.
Ontario’s 13% HST rate
The CRA’s rate and place-of-supply rules treat Ontario as a participating province with a 13% HST rate. That is the baseline expectation for many Ontario sales, but the final answer still depends on the place of supply.
Goods often follow the delivery destination. Services and some digital supplies can follow the recipient address or other location rules. Acctax checks the supply type before the return is prepared, so Ontario sales are not mixed with other provincial outcomes.
Why does your rate change by customer location?
Place of supply determines the rate you charge. CRA examples show that goods delivered to Ontario are generally charged at 13% HST, while supplies made in a non-participating province are generally charged at 5% GST.
| Scenario | Typical tax outcome |
|---|---|
| Goods delivered to an Ontario customer | 13% HST |
| Service made in Ontario under the place-of-supply rules | 13% HST |
| Supply made in a non-participating province | 5% GST |
| Supply is tied to another participating province | Another HST rate can apply |
Quick Method vs regular method: which affects your remittance?
The Quick Method changes how eligible businesses calculate net tax to remit, but it does not change the GST or HST rate charged to customers.
What Quick Method is and who may qualify
The CRA’s Quick Method of Accounting for GST/HST is an election that can simplify remittance for some small registrants. Many users qualify only if annual worldwide taxable supplies, including associates, stay at or below $400,000. Quick Method is not the same as standard ITC treatment. It still requires the normal GST or HST rate to be charged on sales, and it can include a 1% credit on the first $30,000 of eligible supplies each fiscal year.Does Quick Method reduce paperwork or increase risk?
Quick Method can reduce line-by-line complexity, but it can also reduce access to ITCs on most operating expenses. The regular method can be better when operating-expense ITCs are meaningful or when the business needs cleaner, more conventional reporting.The Acctax Approach: Method choice is a calculation question, not a shortcut question. Acctax compares revenue mix, expense mix, and reporting period before advising which fits your remittance profile.
Our GST/HST filing process, and what it costs
Acctax follows a clear filing process, then prices the work based on periods, cleanup level, and record quality.
Step by step: intake, reconciliation, draft, file, confirmation
We review the reporting period, filing status, and any missed returns or CRA notices.
We request sales reports, purchase records, bank statements, and tax-code details.
We tie platform payouts back to GST/HST collected and review ITCs against requirements.
We calculate net tax, flag issues, and confirm the filing and payment deadlines.
We submit through CRA-approved channels and provide official filing confirmation.
We share the remittance amount, workpapers, and cleanup recommendations.
Pricing Model Options
Fits one filing period, one correction, or a defined catch-up job.
Fits businesses wanting period reconciliations and less filing friction via Monthly Bookkeeping.
Monthly support works best when errors start in the books, not just the form.
Is Acctax the right fit?
- Right Fit: Registered Ontario businesses, threshold-crossing sellers, and e-commerce/POS operators.
- Not the Right Fit: Businesses that make only exempt supplies and do not need to register.
GST/HST filing FAQs
GST/HST filing questions usually come down to access codes, deadlines, and ITC records.
Do I need an access code?
An access code is usually needed only when you file through the standalone GST/HST NETFILE form outside a CRA account. My Business Account and Represent a Client do not use that same standalone access-code requirement.
When are the monthly and quarterly deadlines?
Monthly and quarterly GST/HST returns are generally due 1 month after the reporting period ends, and the payment deadline is usually the same date. The exact due date appears in your CRA filing information and account history.
What records do I need for ITCs?
ITCs need invoices, receipts, contracts, or other business papers that show the supplier, the tax charged, and the business purpose of the purchase. CRA expects enough detail to support the claim, and the records usually need to be kept for 6 years from the end of the year they relate to.
Need GST/HST filing support?
Book a consultation if you need expert support in Kitchener, Waterloo, Cambridge, or anywhere in Ontario.
