Frequently Asked Questions

CG1 Helper is a tool that simplifies Capital Gains Tax (CGT) calculations for the Irish Revenue CG1 return. It processes your trading data and presents a structured breakdown of your CGT position to help you prepare your CG1 return.

Your eToro statement (Excel export), including the Closed Positions and Account Activity sheets.

CG1 Helper currently supports eToro statements. Support for additional brokers is planned in future versions.

CG1 Helper supports tax years from 2020 onwards.

  • Revenue typically publishes the official exchange rate for the prior tax year in February each year
  • We target to have the CG1 form and official Revenue rates available on our website from 1 March
  • ECB provisional annual averages may be used until official rates are released
  • After release, the tool can be used to support final CG1 filing

The ECB provisional rate is an average USD to EUR exchange rate based on European Central Bank data for the year being processed, before the official Revenue annual FX rate is available.

  • In December, it can be used to help estimate CGT due for the 15 December payment date using an average based on the months available to date
  • In January, it can be used to help estimate your full-year CGT position using an average based on all 12 months of the tax year
  • Once Revenue publishes the official annual FX rate, that rate should be used for final CG1 filing

CG1 Helper applies a USD to EUR exchange rate when converting your trading results.

  • For prior years, the official Revenue annual FX rate is used
  • For the current year, you may choose to use the ECB provisional annual average until the official rate is published

FX rates are applied consistently across your calculation, but you should review all figures before filing.

Yes. CG1 Helper estimates your CGT position based on the data and options provided, including indicative amounts for the December and January payment dates where applicable. You should review all figures before using them for filing or payment.

The Revenue Bed & Breakfast (B&B) rule restricts the use of losses where the same asset is repurchased within 30 days. Where selected, CG1 Helper applies an automated B&B adjustment based on the transaction data in your uploaded file.

Where losses are restricted under this rule, they are deferred and carried forward to future disposals where applicable.

Irish-domiciled ETFs are subject to different tax treatment and are not included in CGT calculations. Where selected, CG1 Helper excludes these transactions from CGT totals while still reporting them separately in the Excel output for reference.

  • Timing adjustments on losses
  • Annual FX rates applied
  • Selected calculation options
  • Prior-year carryforward included

No. CG1 Helper is designed to support standard realised trading activity from supported broker statements. It may not account for all tax scenarios, reliefs, elections, or individual circumstances.

You should review all figures carefully and seek professional advice where needed.

Your file is processed securely within encrypted cloud infrastructure and stored only for the time required to generate your results. Files are deleted shortly after processing, typically within one hour, and are not retained beyond what is necessary to deliver the service.

  • 15 December for January to November gains
  • 31 January for December gains
  • CG1 return due by 31 October the following year

CGT is paid directly to Irish Revenue, typically using ROS or myAccount.

  • Only trades included in your uploaded broker statement are processed
  • Shares, ETFs, crypto and CFDs
  • High-volume trading
  • Loss tracking and carryforward
  • Items not included in your broker statement
  • Spouse or civil partner transfers
  • Offshore funds and life policies
  • Property or development land
  • Specialist reliefs
  • Unlock access to features when processing a file
  • Limited free codes released periodically
  • Subscribe to our YouTube channel for updates
  • Codes may expire or have usage limits
  • Provides automated calculations and general guidance only
  • Not financial or tax advice
  • Does not replace professional advice
  • You are responsible for reviewing outputs before submission