Easily file your Form C-S with Xero
Xero accounting software keeps all your numbers in one place. So when it’s time for your company tax return, your P&L data flows into the relevant fields with the help of auto mapping. Just check the info, add anything that’s missing, then send the form straight to IRAS.
From ledger to return in one smooth flow
Skip the clunky processes. Xero gives you a joined-up way to handle your company tax filing.
Xero pulls, you review
No more IRAS portal or spreadsheets. Xero pulls data from your P&L and chart of accounts. Review, and submit!
IRAS-verified calculations
Xero uses IRAS’s own API to make sure your calculations are spot on.
Year 2 is even faster
Next time, find your account mappings and multi-year asset schedules ready for your returns.
Ditch the spreadsheets
Want to replace your spreadsheets with an easy workflow? Xero pulls your financial data into your Form C-S, where automations map the figures into the right fields and your assets carry forward from the previous year.
- Bulk-import data into Xero’s fixed asset register with a CSV file
- Let Xero automatically populate fields of the Form C-S, including prior-year data via CorpPass
- Manually enter info for any missing fields of the Form C-S
Keep your tax records accurate
Tax time doesn't need to be tiring. Xero’s Form C-S software traces every figure in your return to the ledger for a reliable process. Once you’re happy with the form, send it directly to the IRAS through CorpPass – and get notified when it arrives.
- CorpPass is the mandatory authorisation system for submitting tax returns to the IRAS
- Get an instant acknowledgement number when IRAS receives your Form C-S
- Follow IRAS rules by keeping digital records of your finances for 5 years in your Xero organisation
Pay nothing extra for IRAS Form C-S filing
Preparing and filing your Form C-S is included at no additional cost for Xero customers on Standard or Premium plans. Manage company tax as part of your wider financial workflows – and breeze through your IRAS reporting.
- Xero is cloud-based accounting software – there’s no separate desktop licence fee
- Give your team members user permissions to control the data they can access
- Add checklists to track your workflow progress
- For now, Xero uses Singapore dollars as its base currency

Is Form C-S the right form for you?
The form you file depends on your business’s annual turnover.
Form C-S Lite
Businesses with revenue under SG$200,000 fill out this 6-field form. Or they can opt into Form C-S to use Xero.
Form C-S
Businesses with revenue under SG$5 million fill out this 18-field form. It’s what Xero prepares and files.
Form C
Businesses with revenue over SG$5 million fill out this more complex form. It’s not covered by Xero.
No more downloading in Excel to work on the tax computation.
- TAN LI HAN, Co Founder, W.L.P PTE LTD
FAQs on Xero’s software for filing your corporate tax in Singapore
As a Xero customer, you’ll have access to this solution if you’re on a Standard or Premium plan. Access by connecting the Xero Compliance Singapore app here.
As a Xero customer, you’ll have access to this solution if you’re on a Standard or Premium plan. Access by connecting the Xero Compliance Singapore app here.
A Form C-S is a simplified corporate income tax return for Singapore businesses with a turnover of up to SG$5 million. Businesses that meet the criteria must prepare and send this form to the IRAS every year.
A Form C-S is a simplified corporate income tax return for Singapore businesses with a turnover of up to SG$5 million. Businesses that meet the criteria must prepare and send this form to the IRAS every year.
It depends. You must file a Form C-S if your business is incorporated in Singapore and:
- has a turnover of SG$5 million or below
- only earns income taxable at the prevailing corporation income tax rate of 17%
- isn’t claiming carry-back of current year capital allowances/losses, group relief, investment allowance, or foreign tax credit and tax deducted at source for the year
It depends. You must file a Form C-S if your business is incorporated in Singapore and:
- has a turnover of SG$5 million or below
- only earns income taxable at the prevailing corporation income tax rate of 17%
- isn’t claiming carry-back of current year capital allowances/losses, group relief, investment allowance, or foreign tax credit and tax deducted at source for the year
The number of fields and complexity. Small businesses fill out a Form C-S Lite, which has only six fields. Large businesses fill out the more complex Form C.
The number of fields and complexity. Small businesses fill out a Form C-S Lite, which has only six fields. Large businesses fill out the more complex Form C.
You must file your corporation tax electronically with the IRAS by 30 November each year.
You must file your corporation tax electronically with the IRAS by 30 November each year.
The corporate income tax rate is a flat 17% on chargeable income (what’s left after subtracting your tax-allowable expenses, personal relief, and so on).
The corporate income tax rate is a flat 17% on chargeable income (what’s left after subtracting your tax-allowable expenses, personal relief, and so on).
ECI stands for estimated chargeable income. It’s a business’s provisional estimate of its taxable profit for a specific financial year. You may need to report your ECI before your Form C-S.
You don’t need to file the ECI for your business if your ECI is nil and your annual revenue is SG$5 million or below.
ECI stands for estimated chargeable income. It’s a business’s provisional estimate of its taxable profit for a specific financial year. You may need to report your ECI before your Form C-S.
You don’t need to file the ECI for your business if your ECI is nil and your annual revenue is SG$5 million or below.
First, Xero pulls financial data straight from your accounting records. Second, you can check the info and add any missing details. Third, you can send your Form C-S straight to the IRAS through CorpPass.
First, Xero pulls financial data straight from your accounting records. Second, you can check the info and add any missing details. Third, you can send your Form C-S straight to the IRAS through CorpPass.
Xero’s Standard and Premium plans include this feature. You can easily prepare and submit your Form C-S to the IRAS through CorpPass.
Xero’s Standard and Premium plans include this feature. You can easily prepare and submit your Form C-S to the IRAS through CorpPass.
Plans to suit your business
All pricing plans cover the accounting essentials, with room to grow.




