Chart of accounts for JPK_CIT in Poland – practical preparation for new reporting obligations
25 June 2026
25 June 2026

The chart of accounts for JPK_CIT is one of the key areas that companies in Poland should review before the new income tax reporting obligations apply. The obligation is not limited to generating a file from the accounting system. Companies must verify whether their data is structured, reconcilable and ready to be submitted to the Polish tax authorities.
Current accounting records may be correct for financial reporting, but still insufficient for JPK_CIT. Preparation should therefore start with data quality at source.
In this article:
In practice, JPK_CIT refers to income tax reporting under JPK_PD, the Polish Standard Audit File for income taxes. For taxpayers keeping accounting books, data concerning accounting books, fixed assets and intangible assets is particularly important.
Errors that could previously be corrected later will become more visible, especially where tax-relevant information is kept outside the accounting system, for example in spreadsheets or manual year-end adjustments.
Preparation should cover the structure of the chart of accounts, accounting analytics, posting rules, identification of tax-relevant data, mapping to reporting structures, responsibility for data and tests before reporting.
Particular attention should be paid to accounts used for transactions with different tax treatment. One account may include both tax-deductible costs and expenses excluded from the tax calculation. Similar risks may concern revenue, depreciation, provisions, exchange differences or debt financing costs.
Companies should check whether CIT calculation data can be obtained directly from the system, whether accounts are detailed enough and whether similar transactions are posted consistently.
One challenge is moving away from a model in which tax data is determined only after the end of the period. The more information is added manually, the greater the risk of inconsistencies and difficulties in reconstructing how the data was prepared.
Not every difference between accounting and tax treatment requires a separate account. Analytical dimensions, dictionaries, markers or auxiliary fields may be sufficient if the model is consistent and practical.
JPK_CIT account mapping should reflect the nature of transactions, how accounts are used, the level of analytics and the link with the income tax calculation. Mapping documentation should include assignments, assumptions, source data and responsibility for updates.
Preparation should combine accounting, tax, system and organisational perspectives. Companies should diagnose data and processes, assess the chart of accounts from a tax perspective, prepare documentation and perform tests.
The additional time resulting from postponed deadlines should be used to organise data, reduce manual corrections and implement control rules. The earlier an organisation verifies its chart of accounts, analytics and mapping, the greater the chance that reporting will be consistent and safe from a tax compliance perspective.
Read the full article here: Chart of accounts for JPK_CIT in Poland – practical preparation for new reporting obligations.
If you have any further questions or require additional information, please contact your business relationship person or use the enquiry form on the HLB Poland website.
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