The IRD says the standard VAT return period is two months. Category A ends in odd-numbered months and Category B in even-numbered months; returns are due by the 25th of the following month.
The two-month VAT accounting cycle
The IRD's VAT submission page describes the standard tax period as two months. A registered business accounts for its applicable output and input VAT during each assigned tax period, then submits the return and pays any net tax due.
This is distinct from tracking monthly revenue or keeping daily invoices. A business can calculate its monthly results for management purposes while preparing its statutory VAT return based on the two-month period assigned by the VAT Administration.
Which category does your business use?
The IRD identifies Category A periods ending in January, March, May, July, September and November. Category B periods end in February, April, June, August, October and December. The VAT Administration advises each registrant which category applies.
A newly registered owner should not choose a category based on convenience. Confirm the assignment in the IRD registration communication, add it to the accounts calendar and ask for clarification if the tax period shown in eServices does not align with the business's records.
How the 25th-day deadline operates
The IRD says the VAT return and tax due must be submitted on or before the 25th of the month following the end of the tax period. For example, a Category A period ending 31 March would normally lead to a filing deadline of 25 April. Category B's period ending 30 April would normally lead to 25 May.
Set reminders before the final day. The accounts team may need time to reconcile invoices, credit notes and input-tax evidence, and electronic service access can create last-minute problems. Confirm any official holidays, extensions or special instructions directly with the IRD instead of assuming they apply.
Prepare the supporting sales records
Collect serially numbered tax invoices, sales journals, customer credit notes and cash receipt summaries for the correct tax period. The IRD sets detailed tax invoice requirements, including the supplier's VAT number, description, VAT-exclusive value, tax and total.
A tax invoice may fall into a different period from the date cash reaches the bank. The IRD's guidance describes the general time-of-supply rules, including invoice, payment and the provision of goods or services. More complex transactions should be reviewed with a tax adviser.
Reconcile purchases and credits
Keep proper supplier tax invoices for potential input VAT claims, then determine which amounts meet the applicable rules. Not every expense produces deductible VAT, particularly where suppliers are not VAT registered or the purchase relates to exempt or private activity.
Compare the VAT control account with invoices, returns and remittances. Save calculations, explanations for adjustments and evidence of submission. Records should be maintained under the IRD's retention rules so historical claims can be supported when queried.
Practical example: the two-month return file
A small stationery company assigned Category B tracks its January and February invoices, purchases and relevant adjustments. At the end of February, the owner reconciles the records, determines the return position and prepares to file by 25 March.
The company also keeps a monthly management report so it understands sales trends, but uses the proper two-month tax period for the VAT submission. A shared calendar and saved return receipts make the next period easier to process without relying on memory.
A filing calendar that survives staff changes
A growing shop should store its assigned category, opening and closing dates for each tax period, submission deadline, accountant contact and proof of prior filing in a central business register. The employee entering invoices and the person authorising the return may be different people, so define a handover procedure that makes omissions visible.
If the IRD changes the assigned period or issues a specific instruction, update the schedule from the official notice and keep the historical record. For a business operating several branches, combine the appropriate activity under the actual VAT registrant rather than filing branch figures inconsistently. A reliable tax calendar should also flag unusually high VAT collected so cash can be reserved before the next payment date.
Action checklist
- Confirm Category A or B directly from VAT Administration.
- Record the correct two-month period end dates.
- Calendar the 25th of the following month.
- Reconcile output VAT, input VAT and adjustments.
- Keep supporting invoices and completed return receipts.
- Seek tax advice for complex time-of-supply transactions.
Questions people ask
Are VAT returns always monthly?
The IRD describes a standard two-month return period, with particular assigned categories.
When is VAT due?
The IRD states by the 25th day of the month following the tax-period end.
Can a company choose Category A?
The VAT Administration assigns the category and informs the registrant.
Official references
Check the responsible authority for instructions that apply when you file. These sources informed this guide:
Related BizReg guides
What BizReg can help with
BizReg can help organise registration and administrative records; accountants or IRD should advise on returns, credits and amounts payable.
View BizReg services Ask BizRegGeneral information for Trinidad and Tobago, researched 21 October 2026. This article does not replace individual legal, tax or accounting advice. The relevant authorities decide applications and requirements.