How to Legally Reduce Income Tax — 10 Methods for Entrepreneurs in 2026

Tax optimisation is not tax avoidance — it is smart use of the law. We have compiled 10 legal and proven methods that can significantly reduce your income tax.

Many entrepreneurs pay more tax than they have to — not because it is fair, but because they are not aware of all the legal tools available. Tax optimisation is entirely legal and is one of the key services of a good accounting firm. Here are 10 methods worth considering before the end of the tax year.

1–3: Tax Reliefs — R&D, IP Box, Start-Up Relief

R&D Relief: deduct 100% (or 200% for R&D centres) of costs incurred on research and development. This applies not only to start-ups — any company creating new products or processes can use it. IP Box: preferential taxation of income from qualifying intellectual property rights at 5% PIT/CIT instead of the standard 19%/32%. Especially popular among developers, software creators and designers. Start-Up Relief (first 6 months of JDG): no ZUS social contributions for the first half-year. Saving of approx. PLN 9,600 per year.

4–6: Tax Form Choice and Depreciation

Choosing the right tax form: tax scale (12%/32%), flat rate (19%), lump-sum tax (2–17% depending on PKD code) or Estonian CIT (no tax until profit is distributed). The right choice can save tens of thousands of PLN annually. One-off depreciation: fixed assets up to PLN 10,000 can be expensed in full at once. Above that — consider one-off depreciation under de minimis aid (limit EUR 50,000 per year). Accelerated depreciation: for brand-new fixed assets you can use the declining-balance method or increased rates — shortening the expensing period from 5 years to 2–3.

7–9: Costs, Company Car, Hiring Family

Optimising business costs: home office, electronic equipment, training courses, professional literature, insurance — these are all legitimate business costs. The key is proper documentation. Company car: operating lease or acquisition into company assets gives full VAT deduction (with 100% business use) and depreciation. Car up to PLN 150,000 in value — full depreciation; above — a cap applies. Hiring a spouse or adult child: the salary is a business cost and reduces the tax base. Condition: the work must be real and the remuneration market-rate.

10: Estonian CIT for Limited Companies

Estonian CIT means taxation only when profit is distributed from the company. As long as the profit remains in the company and is reinvested, you pay no tax. This is a revolution for companies that want to grow quickly. Conditions: limited liability company (sp. z o.o.) or joint-stock company, revenue up to PLN 100 million, min. 3 employees on employment contracts, no shares in other entities (broadly). Effective Estonian CIT rate after dividend distribution: approx. 20% (small taxpayer) or 25% (others), vs 19% standard CIT + 19% PIT on dividend = approx. 34% via the standard route.

Tax optimisation is year-round work — not just something to do before December. Schedule a consultation with Danexis and we will review your tax situation together. Often a few changes are enough to save several thousand PLN per year.