Is it worth changing the form of taxation in 2026?

How to choose a form of taxation in 2026?

The year 2026 presents Polish entrepreneurs with entirely new challenges when it comes to choosing a form of taxation for their business activities. On the one hand, we are seeing further digitisation of tax returns (KSeF, e-Urząd Skarbowy); on the other, there are fundamental changes to the health insurance contribution system and social security benefits. In practice, this means that the decision on which form of taxation to choose in 2026 will have an even greater impact on a company’s profitability and financial liquidity than in previous years.

Most business owners have until 20 February 2026 to declare their choice or change of taxation regime (or by the 20th day of the month following the month in which the first revenue was generated in the tax year, if the business commences operations later). By default, if you do not submit the relevant declaration by the deadline (via CEIDG or directly to the Tax Office), you will be subject to the general rules – the tax scale – for the whole of 2026.

In the new legal environment, where business operating costs, contribution rates and the availability of tax reliefs change practically from year to year, there is no one-size-fits-all answer to the question of which form of taxation is best. Each situation requires an individual calculation, and the differences in tax liability can amount to as much as several tens of thousands of zlotys a year.

When is it worth changing your tax regime in 2026?

Changing the form of taxation is usually most beneficial when:

• the business has significantly increased (or plans to increase) its revenue or costs,
• the nature of the business has changed (e.g. a shift from services to retail),
• there is an opportunity to take advantage of tax reliefs available only under a specific form of taxation,
• your family circumstances have changed (e.g. the birth of a child, the option to file a joint tax return with your spouse),
• you wish to simplify your bookkeeping and reduce red tape.

A change in the amount of the health insurance contribution is also key. According to experts, by 2026 it will be the method of calculating this contribution that often determines the cost-effectiveness of the chosen tax regime. Example: a person on the flat-rate tax scheme with a net monthly income of over 16,000 zł may pay less than under the lump-sum scheme, but only provided they do not claim tax reliefs available exclusively under the tax scale.

What forms of business taxation are available in 2026?

In 2026, sole traders will have the following options:

1. The tax scale (general rules): a progressive rate of 12 per cent (up to PLN 120,000 annual income) and 32 per cent (on the excess), with a tax-free allowance of PLN 30,000; full access to tax reliefs and joint tax returns with a spouse.
2. Flat-rate tax: a fixed rate of 19 per cent regardless of income, with no tax-free allowance and most tax reliefs excluded; a favourable option for high earners and those with high business costs.
3. Lump-sum tax on recorded income: tax calculated on income (rates ranging from 2% to 17% depending on the PKD code), no possibility of deducting costs, limited access to tax reliefs, simplified accounting.
4. Tax card: available only to those who were using it before 31 December 2021 – new applications are not accepted.

Each of these options differs not only in the amount of tax but also in the method of accounting for costs, the availability of tax reliefs, the rules for calculating social security contributions and the accounting requirements.

What changes to taxes and contributions can entrepreneurs expect in 2026?

The year 2026 will, above all, bring a revolution in the settlement of health insurance contributions and the introduction of the mandatory KSeF (National e-Invoice System) for all business owners. Health insurance contributions under every form of taxation will be calculated according to new rules:

Tax scale: 9 per cent of income, with no possibility of a tax deduction. The contribution cannot be less than 9 per cent of the minimum wage.

Flat-rate tax: 4.9 per cent of income, with a deduction limit (up to 14,100 PLN per year in 2026).

Lump-sum tax: Three thresholds – up to PLN 60,000, up to PLN 300,000 and over PLN 300,000 in income, with rates set on the basis of the average wage for the fourth quarter of the previous year. The contribution is a flat-rate payment, but once the threshold is exceeded, the difference must be paid retrospectively for the whole year.

As Anna Misiak, a tax adviser at MDDP, points out:

“In 2026, the rule under which a business owner paying tax at a flat rate can deduct part of their contributions from their income will remain unchanged. On the other hand, those on the flat-rate scheme can still deduct 50 per cent of the contributions paid from their income. Those taxed on a progressive scale are not entitled to any deductions.” – Anna Misiak, tax adviser and partner at MDDP, 2025

In practice, these changes mean that the flat-rate tax loses many of its previous advantages, whilst the lump-sum scheme – despite its low rates – becomes risky for businesses with high costs or significant fluctuations in revenue. The tax scale is gaining in importance, particularly for businesses with an annual income of up to 120,000 zł.

When to opt for the flat-rate scheme, when for the flat tax, and when for the tax scale?

Advisers’ experience shows that the flat-rate tax on recorded revenue is primarily beneficial for businesses with low costs, such as freelancers, creative services and IT firms (though not all – PKWiU codes are crucial!). With a low margin and high costs, the flat-rate scheme may result in a higher tax bill than the flat rate or the tax scale. Important: exceeding the revenue limit of 2 million euros (8,517,000 PLN in 2026) disqualifies you from this scheme in the following year.

The flat-rate tax is a solution for those who exceed the first threshold on the tax scale (120,000 PLN) and do not claim tax reliefs, whilst also having high expenses (e.g. investments, leases). For lower incomes, the flat rate is less attractive than the tax scale (no tax-free allowance, no joint tax return with a spouse).

The tax scale is the default option. It benefits those with an annual income of up to 120,000 zł (the effective rate, after taking the tax-free allowance into account, is as low as 7.6%!), who claim tax reliefs (e.g. for children, internet, joint tax returns), as well as those whose income is variable or seasonal.

According to data compiled by Łukasz Zalewski of Business Insider Polska:

“An entrepreneur who was taxed under the PIT scale in 2025 and wishes to switch to the flat-rate tax scheme, they must submit a declaration to the head of the tax office or amend their entry in the CEIDG by 20 February 2026.” – Łukasz Zalewski, journalist in the Legal section of Business Insider Polska, 2025

How do you analyse the cost-effectiveness of a tax regime?

The most common mistake entrepreneurs make is choosing a tax regime based on a hunch or “because a friend did it that way”. Every business has its own specific costs, margins and seasonal patterns. According to tax advisers’ best practice, the analysis should proceed as follows:

1. List all income and expenses for 2025, taking into account forecasts for 2026.
2. Simulate tax and social security contributions for each form (free online calculators are available, e.g. e-pity.pl).
3. Take into account tax reliefs and the option of joint taxation with a spouse, as well as deductions for social security contributions, depreciation and leasing.
4. Check the thresholds (flat-rate scheme, small taxpayer scheme, quarterly tax returns).
5. Analysing the specifics of PKD and PKWiU classifications for the flat-rate scheme – there are often pitfalls here (e.g. IT 8.5% versus 12%).

Failing to include health insurance contributions in the calculation is the most common mistake – the differences can amount to several thousand zlotys a year.

What are the most common pitfalls when changing the form of taxation?

Changing your tax regime in 2026 is a formalised process, but one that can be carried out entirely online. The main risks and mistakes:

• Submitting the application after the deadline – even a single day’s delay means you’ll have to stick with the old tax regime for the whole year.
• Failure to obtain confirmation of the application’s submission via CEIDG – the system sometimes fails, so it is advisable to download the UPO and confirm it with the tax office.
• Incorrect selection of the PKWiU code for the flat-rate scheme – an incorrect rate carries the risk of having to pay additional amounts with interest, even for several years back.
• Failure to simulate the total tax and social security contributions.
• A “transfer with a reference” instead of a formal change in the CEIDG – the authorities are exceptionally strict in this regard.

In 2026, according to tax advisers, particular attention should be paid to new interpretations regarding the flat-rate scheme in specialist sectors (IT, consulting, advisory services). The tax authorities are increasingly questioning rates that are too low in these sectors.

What are some practical examples of choosing a form of taxation?

Here are a few typical scenarios that tax advisers are encountering in 2025:

• An IT programmer with a monthly income of 20,000 zł, monthly expenses of 1,500 zł, no children and no complex cost structure: they usually opt for the 12% flat-rate scheme, provided their services are subject to this rate. A flat-rate health insurance contribution, simplicity of accounting, and an effective tax burden often lower than under the standard tax scheme.
• A trader with a monthly income of 50,000 PLN, a 10 per cent margin, a large lease and joint tax filing with a non-working spouse: here, the tax scale proves more favourable – the possibility of deducting costs, access to tax reliefs and the tax-free allowance.
• A marketing specialist, with a monthly income of 12,000 zł, monthly costs of 2,000 zł and one child: when filing under the tax scale, they benefit from the child tax credit and the tax-free allowance, and the effective tax rate is lower than 12 per cent.
• A construction firm with seasonal income, 80 per cent of which is earned between May and October: it utilises the quarterly flat-rate tax and keeps detailed records of expenses, which helps to reduce the tax base.

These examples show that the choice of tax regime in 2026 depends not only on the level of revenue, but also on the distribution of costs, seasonality and development plans.

How do you change your tax regime step by step?

The process of changing your tax regime is straightforward, but you must meet the deadline:

1. Log in to biznes.gov.pl and open the application to amend business details (CEIDG-1).
2. In the section on tax, select the new form of taxation (progressive scale, flat-rate tax, lump-sum tax).
3. Sign the application using a trusted profile or an e-ID.
4. Download the UPO (Official Confirmation of Receipt) – this is your proof in the event of an audit.
5. Send the confirmation to your accountant – from the moment the change takes effect, your accounts will be kept in accordance with the new rules.

If you receive your first income in 2026 in March – the deadline is extended to 20 April 2026. If your first income is received in December – you have until the end of the tax year (31 December 2026).

What are the main differences between the tax regimes in 2026?

The main differences relate to:

• Tax scale: income is taxed, access to all tax reliefs, the option for joint filing, tax-free allowance.
• Flat-rate tax: a single rate of 19 per cent; income is taxed; most tax reliefs are not available; there is no tax-free allowance; the option to deduct part of the health insurance contribution up to a limit.
• Lump-sum scheme: revenue is taxed (excluding costs), rates depend on the PKD/PKWiU classification, simplified accounting, limited tax reliefs and no option for joint tax returns, with the option to deduct half of the health insurance contribution from revenue.
• Tax card: fixed tax amounts, no record-keeping of costs, available only to those continuing with this form from before 2022.

When deciding which form of taxation to choose in 2026, it is also worth taking into account the revenue thresholds that qualify you for the flat-rate scheme or for quarterly tax returns.

What are the latest trends and challenges in tax returns for 2026?

Business owners must prepare for several new developments:

• KSeF (National e-Invoice System) – from 2026, e-invoices will be compulsory for everyone.
• New VAT thresholds – in 2026, the VAT exemption threshold rises to 240,000 zł.
• Changes to leasing and depreciation costs – a cap on deductions for petrol and diesel cars at PLN 100,000.
• Stricter checks on flat-rate tax schemes, particularly in the IT and consultancy sectors.

It is also worth bearing in mind the planned (albeit postponed until 2027) changes to tax relief schemes, such as the IP Box and the housing allowance. 2026 is therefore the last year to take advantage of certain tax benefits.

As Agnieszka Wnuk, a tax adviser at Quidea, points out:

“The Ministry has reaffirmed its intention to introduce changes to the taxation of the sale of post-lease assets (…), the housing allowance and the solidarity levy. The Ministry of Finance also has no intention of abandoning plans to tighten the rules on the IP Box, which are likely to prevent many businesses from utilising this scheme.” – Agnieszka Wnuk, tax adviser and partner at Quidea, 2025

What are the key takeaways and practical tips?

In 2026, an individual analysis of a company’s situation becomes more important than ever before. What was profitable a year ago may, in the new reality, generate excessive costs. Key recommendations:

• Don’t leave decisions until the last minute – 20 February is the absolute deadline for most business owners.
• Carry out a full simulation of tax and social security contributions for each option.
• Take into account planned investments, family circumstances, available tax reliefs and revenue limits.
• If opting for the flat-rate scheme – check the PKWiU codes and rates very carefully and forecast your income with a safety margin.
• Keep an eye on changes to the regulations – new interpretations may emerge even during the course of the year.

Remember: choosing a tax regime is a strategic decision for the whole year. Once made, it applies until the end of the tax year, and a change during the year is only possible in exceptional circumstances (e.g. loss of entitlement to the flat-rate scheme after exceeding the limit).

Frequently asked questions about choosing a tax regime in 2026

Is it possible to change the form of taxation during the year?

Changing the tax regime during the year is generally not possible – the exceptions are situations where the right to the flat-rate scheme, tax card or flat-rate tax is lost (e.g. exceeding the income limit, or carrying out an activity that excludes one from that regime). As a rule, the tax regime must be chosen by the 20th day following the first income received in the tax year – this decision is binding for the entire year.

Is it possible to change the form of taxation for 2025?

No – a change to the tax regime applies to the following tax year. The exception was 2022 (the Polish Deal), when changes were possible with retroactive effect. Currently, the choice applies only to tax returns for 2026.

What should you bear in mind with the flat-rate scheme?

First and foremost, the revenue limit (2 million euros), the correct PKWiU code, and whether you are working with a former employer (which excludes the flat-rate scheme). The flat-rate scheme is advantageous where costs are low and revenue is highly predictable.

What happens if I miss the deadline for changing my tax regime?

You’ll remain under your current tax regime for the whole year – there’s no option for ‘voluntary correction’ or appeal. This often means higher tax and social security contributions.

Can I file a joint tax return with my spouse under the lump-sum or flat-rate schemes?

Income from the lump-sum scheme and the flat-rate scheme are not combined in a joint PIT return – they are filed separately. However, if your spouse earns income taxed under the progressive scale (e.g. from full-time employment), you can file a joint return based solely on that income.

When does the KSeF come into force and what are the consequences?

The National e-Invoice System (KSeF) will be mandatory from 1 January 2026 for all businesses. This means that invoices must be issued exclusively in electronic form, which requires organising documentation and adapting accounting software.

In 2026, choosing the optimal form of taxation is a matter requiring thorough analysis and knowledge of the latest regulations. Changes to contributions, taxes and the digitisation of tax returns mean that what was advantageous a year ago may now result in losses. A tailored approach and a cost simulation for your business are key.

If you’d like to find out which form of taxation to choose in 2026 and which solution will be most advantageous in your situation, please get in touch with Firma dla Każdego. We offer legal and accounting support, as well as the opportunity to run your business legally without ZUS contributions or the formalities associated with a sole trader (JDG). Ensure your tax compliance – it simply pays off.