IR8A Filing Guide

IR8A and the Auto-Inclusion Scheme: The Employer Filing Guide

Every year, IR8A season catches SMEs out. Here is who has to file, what the forms are, when they are due, and how to stop dreading it.

What IR8A actually is

IR8A is the form employers use to report each employee's income to IRAS. Depending on the situation it comes with appendices: Appendix 8A for benefits-in-kind, Appendix 8B for share option gains, and IR8S where there are excess CPF contributions. For most SMEs the core is the IR8A itself, filed for every employee.

Who must file through AIS, and when

Companies with five or more employees must submit employment income to IRAS through the Auto-Inclusion Scheme, or AIS. Under AIS the income information goes straight to IRAS and is auto-included in employees' tax assessments, so your people do not enter it manually. The deadline is 1 March each year. Missing it, or filing wrong figures, creates work and risk for both you and your staff.

What happens if you miss the deadline or file wrong

IR8A is a statutory filing, so a missed or incorrect submission is not a quiet internal problem. Late or non-filing can lead to enforcement action from IRAS, and incorrect figures create downstream problems for your employees when their tax assessments are auto-populated from data you submitted. Because the information flows straight into your people's assessments under the Auto-Inclusion Scheme, an error you make becomes an error they have to sort out. That is what makes accuracy here matter as much as timeliness. The safest position is to file correctly and on time from data that was already validated during payroll, rather than assembling it manually in February.

The filing sequence, start to finish

For an SME, the process runs in a clear order. First, payroll for the year must be complete and correct, because IR8A is built from it. Second, the IR8A and any relevant appendices are prepared for every employee. Third, the data is submitted to IRAS through the Auto-Inclusion Scheme before the deadline. Fourth, employees are given their own copy for reference. When payroll and filing live in the same system, steps one through three collapse into a single action, because the software already holds the validated payroll data and submits it directly. When they live in separate places, each step is a manual handoff, and every handoff is a chance to introduce an error.

Where AI helps, and where it does not

The same honest rule applies. Do not ask a general AI tool to interpret a tax form or compute the figures. The reliable path is software that generates accurate IR8A data directly from the payroll you have already run, and submits it to IRAS through AIS, rather than exporting a CSV for someone to upload and hope. AI is useful around the edges: answering employee questions about what auto-inclusion means for their filing, and flagging odd figures before they are submitted.

Make next March quiet

IR8A is only painful when payroll and tax filing live in different places. When your payroll system produces the IR8A data and files it through AIS on your behalf, the 1 March deadline stops being an event. PeopleCentral files directly to IRAS through the government portal.

Frequently asked questions

Who needs to file IR8A through the Auto-Inclusion Scheme?

Employers at or above the Auto-Inclusion Scheme threshold must submit employment income to IRAS through AIS. Confirm the current employee threshold with IRAS, as it has tightened over time.

When is the IR8A deadline?

The annual deadline is 1 March. Employers should have payroll finalised well before then so the IR8A data is ready to submit.

What is the Auto-Inclusion Scheme?

Under AIS, employers send employment income data directly to IRAS, and it is automatically included in employees' tax assessments, so employees do not enter it manually.

What are Appendix 8A, Appendix 8B and IR8S?

Appendix 8A covers benefits-in-kind, Appendix 8B covers share option gains, and IR8S applies where there are excess CPF contributions. The IR8A itself is the core income form filed for every employee.

What happens if I miss the IR8A deadline?

Late or non-filing can lead to enforcement action from IRAS, and incorrect figures create downstream problems for employees whose assessments are auto-populated from your submission. File correctly and on time to avoid both.

Can IR8A be filed automatically?

Yes. Payroll software can generate IR8A data from your completed payroll and submit it directly to IRAS through AIS, instead of manual CSV uploads.

How do I make IR8A season less painful?

Keep payroll and tax filing in one system. When the payroll platform produces the IR8A data and files it through AIS on your behalf, the 1 March deadline stops being a separate scramble.