Official form guide
Form CG1 helpsheet
The Form CG1 helpsheet is a guidance document issued by the Revenue Commissioners to assist taxpayers with completing the CG1 tax form. It provides step-by-step instructions and explanations for reporting tax obligations related to capital gains or other specified transactions.
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Form Overview
Revenue Commissioners - Form CG1 helpsheet
The Form CG1 helpsheet is a guidance document issued by the Revenue Commissioners to assist taxpayers with completing the CG1 tax form. It provides step-by-step instructions and explanations for reporting tax obligations related to capital gains or other specified transactions.
Risk Radar
Scan points- 1The most common mistake is miscalculating the taxable gain or loss, which can lead to underpayment or overpayment of tax.
- 2Incorrect calculation of gain or loss
- 3Missing supporting documentation
- 4Late submission leading to penalties
- 5Incomplete declaration sections
Plain English
This helpsheet breaks down the official CG1 form into simpler terms, making it easier for regular people to understand their tax reporting requirements. It explains what information you need to gather and how to correctly fill out each section of the form.
Submission Date
- Filing date: The CG1 form must be submitted within 21 days of the notice date or by the annual tax return deadline, whichever is later. Late submissions may incur interest charges and penalties.
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use this helpsheet when completing the CG1 form issued by Revenue
- Required for reporting capital gains or specified transactions
- Necessary if you've received a notice specifically requesting CG1 completion
- Appropriate for both individuals and businesses reporting certain gains
- Use when you need to calculate tax on disposals of assets
Form selector
Use this form or another form?
Self-assessment tax return
For annual income reporting rather than specific transactions
✓ Check if your gain is reported elsewhere on your return
Property disposal
Different calculations and thresholds apply
✓ Verify if you need the property-specific version
Form CG1 (Property) Specific version for property transactions
Business asset disposal
Different relief applications may be available
✓ Confirm if business asset relief applies to your transaction
Inheritance of assets
For reporting inherited assets rather than disposals
✓ Check if you received or disposed of the asset
Deadline or filing window
The CG1 form must be submitted within 21 days of the notice date or by the annual tax return deadline, whichever is later. Late submissions may incur interest charges and penalties.
Before you submit
- 1All sections completed in full
- 2Calculations verified with examples in helpsheet
- 3Supporting documentation attached or referenced
- 4Declaration signed and dated
- 5Payment reference number included if applicable
- 6Correct postage if submitting by post
- 7Copy retained for your records
How to file this form
- 1Read the entire helpsheet to understand requirements
- 2Gather all relevant documents and transaction details
- 3Complete each section following the examples provided
- 4Verify calculations and check for completeness
- 5Submit online through ROS or by post as appropriate
- 6Keep a copy of the submitted form for your records
Known limitations
- 1The helpsheet doesn't cover all possible asset types
- 2Specific relief calculations may require additional guidance
- 3International transactions may require separate considerations
- 4Complex business disposals may need professional advice
Field map
Compact field-by-field guide
Identity
3 items
Your full name as Revenue holds it.
Your Personal Public Service number — Revenue matches the form to your record with this.
Your current address, including Eircode.
Details
1 items
The year or period the form relates to.
Amounts
1 items
Enter each amount against the heading it belongs to.
Declaration
1 items
Sign to confirm the details are correct and complete.
Almost done reviewing the fields?
Fillable formOpen in Editor->The current CG1 helpsheet is valid for the 2023 tax year. Always check the Revenue website for the latest version before completing your form.
What changed or needs a fresh check
- Verify the current tax year on the form
- Check for updated calculation examples
- Confirm current tax rates and thresholds
- Review any recent legislative changes affecting capital gains
- Ensure you're using the latest Revenue guidance
Quick Facts
Downloads & source
Sources
- SRCForm CG1 helpsheet issued by Revenue Commissioners
- SRCAvailable on Revenue Online Service (ROS)
- SRCUpdated annually for tax year changes
- SRCNot confirmed in official source: specific calculation examples
- SRCNot confirmed in official source: current tax rates
- SRCNot confirmed in official source: exact submission deadlines
- SRCNot confirmed in official source: recent legislative changes
Common confusion points
Determining which assets are subject to capital gains tax
Calculating the base cost for inherited assets
Understanding available reliefs and exemptions
Distinguishing between capital gains and income
Reporting losses that can be offset against gains
Completing forms for jointly owned assets
Understanding the difference between CG1 and other tax forms
Source transparency
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