12% Lump Sum Tax for Programmers in 2026 - Complete Guide

B2B programmers in Poland can choose from three taxation forms: 12% lump sum tax, 19% flat tax, and the progressive tax scale. Which option is most beneficial in 2026? Let's analyze it in detail.

How does lump sum tax work for programmers?

Lump sum tax is a form of taxation where you pay tax on revenue, not on income. This means you cannot deduct business expenses.

For programming services (PKD 62.01.Z, 62.02.Z, 62.09.Z) the rate is 12%.

Tax calculation formula

Tax = (Revenue - Social ZUS - 50% health insurance) x 12%

Example: You invoice 25,000 PLN per month (full ZUS):

• Base: 25,000 - 1,926.76 (ZUS) - 415.29 (50% health) = 22,657.95 PLN
• Tax: 22,657.95 PLN x 12% = 2,719 PLN

Health insurance with lump sum in 2026

With lump sum taxation, health insurance is flat-rate and depends on the annual revenue bracket:

Bonus: With lump sum you can deduct 50% of health insurance from revenue.

When does 12% lump sum pay off?

Choose lump sum when:

1. Low business expenses - below 10-15% of revenue
2. Working remotely - no office costs
3. Minimal equipment purchases - laptop once every 3-4 years
4. You value simplicity - no need to collect expense invoices
5. Revenue exceeds 120,000 PLN annually - you're above the progressive scale threshold

Summary

The 12% lump sum is most beneficial for programmers with low expenses and revenue above 10,000 PLN monthly. It offers simplicity and predictable tax obligations.

Check what works best for your situation:

• Lump sum calculator
• Tax calculators
• Try Bookeper AI for free