Mały ZUS Plus allows entrepreneurs with low income to pay lower social security contributions. Find out who can benefit in 2026 and how to correctly calculate your obligations.
Running a sole proprietorship entails an obligation to pay ZUS contributions, which can constitute a significant burden for businesses with low revenues. However, the legislator has provided a solution for the smallest entrepreneurs — Mały ZUS Plus, a preferential form of contribution assessment in which the contribution base depends on actually earned income. In this article we explain who can benefit from Mały ZUS Plus in 2026, how to correctly calculate the contributions due, and which registration deadlines must be met without exception.
Mały ZUS Plus (MZP) is a mechanism that allows entrepreneurs to pay social insurance contributions based on a contribution base calculated from their actual income for the previous calendar year, rather than from the standard contribution base equal to 60% of the projected average salary. The relief covers contributions to pension, disability, accident and sickness insurance (the last one on a voluntary basis). It does not apply to the health insurance contribution — this is calculated separately, in accordance with the rules applicable to the given form of taxation. Thanks to MZP, social contributions can be noticeably lower than in the standard variant, which directly improves the cash flow of small businesses, particularly in the first years of operation or during more difficult months.
To benefit from Mały ZUS Plus in 2026, an entrepreneur must simultaneously meet several conditions: 1. Revenue from business activity in 2025 must not have exceeded PLN 120,000 (statutory limit — verify its current value on the date of registration). 2. The business activity was conducted for at least 60 days in 2025. 3. In the previous year, the entrepreneur did not perform activity for a former employer within the scope of duties identical to their employment obligations. 4. In the previous year, a tax card (karta podatkowa) was not used in combination with VAT exemption. 5. The entrepreneur has not used Mały ZUS Plus for a combined total of more than 36 months within the last 60 months of conducting business activity. Persons who, during the first 24 months of activity, are paying preferential ZUS contributions are not eligible for the relief — these two schemes are mutually exclusive.
Calculating the contribution base under Mały ZUS Plus requires several steps: 1. Determine your income from business activity for 2025 (revenue minus costs, excluding tax reliefs). 2. Divide the income by the number of days the business was conducted in 2025, then multiply by 30 — this gives you the average monthly income. 3. Multiply the result by a factor of 0.5 — this is your contribution base for the given year. Example: annual income PLN 60,000, business conducted for 365 days. • Average monthly income: (60,000 / 365) × 30 ≈ PLN 4,931 • MZP base: 4,931 × 0.5 ≈ PLN 2,466 Please note that the calculated base cannot be lower than 30% of the minimum wage or higher than 60% of the projected average salary. Both limits are worth checking at the beginning of each year, as they change with updates to GUS and MPiPS indicators.
The Mały ZUS Plus registration deadline is one of the most frequently overlooked aspects of this relief, and missing it means losing the right to the preference for the entire current year. Registration must be completed: • By 31 January 2026 — if the business was being conducted on 1 January 2026. • Within 7 days of resuming business activity — if the business was suspended and is being resumed during the year. • Within 7 days of commencing business activity — if the entrepreneur meets the conditions (e.g. after the expiry of the 24-month preferential contributions period). In practice, registration involves submitting the relevant ZUS forms: deregistration from the current code (ZUS ZWUA) and re-registration with the code applicable to MZP (ZUS ZUA or ZUS ZZA). The registration must be accompanied by form ZUS DRA or ZUS RCA with the appropriate contribution base.
Mały ZUS Plus reduces only social insurance contributions. The health insurance contribution in 2026 continues to be calculated under separate rules, depending on the form of taxation: • Progressive tax scale and flat tax: the health insurance contribution amounts to 9% or 4.9% of income respectively (subject to the statutory minimum). • Lump-sum tax on recorded revenues (ryczałt od przychodów ewidencjonowanych): the health insurance contribution depends on the revenue threshold. • Tax card (karta podatkowa): a fixed amount set annually. It is a mistake to assume that MZP reduces the entirety of ZUS obligations — the savings apply only to the social insurance portion. Therefore, before deciding on a form of taxation and applying MZP, it is advisable to prepare a full comparison of the total contribution and tax burden.
Office practice shows that entrepreneurs make several recurring mistakes with Mały ZUS Plus: • Exceeding the 36-month limit without being aware that the relief is about to expire — it is worth monitoring the number of months used. • Incorrectly calculating the number of days the business was conducted — any break (suspension) changes the result and may inflate the contribution base. • Failing to verify the revenue limit before submitting the registration — exceeding PLN 120,000 disqualifies from the relief. • Omitting the obligation to submit the additional ZUS RIA form (a report of information on annual revenue and contribution base) by the end of January. • Applying MZP simultaneously with preferential contributions — these two instruments cannot be used at the same time.
Mały ZUS Plus is a genuine cost-reduction tool for entrepreneurs with low income; however, its correct application requires precise calculations, knowledge of the applicable limits and adherence to strict deadlines. Errors in registration or calculations may result in the loss of the relief or arrears owed to ZUS. If you want to be certain that your contributions are calculated and reported correctly, contact Danexis accounting office — call +48 780 760 666 or write to kontakt@danexis.pl. Our specialists will analyse your situation and take care of every formal detail.