The Progression Proviso: Why Short-Time Work Leads to a Tax Back Payment
For many employees it is the nastiest surprise after a year of short-time work: the allowance was tax-free, and yet a tax assessment lands the following year demanding a solidly three-figure or even four-figure back payment. The reason is called the progression proviso, sits in § 32b EStG, and is not a mistake by the tax office but deliberate design.
Tax-free does not mean without consequences
Short-time work allowance belongs, like unemployment benefit, sick pay, parental allowance and maternity pay, to the wage replacement benefits. Under § 3 EStG these benefits are not taxed — they do not raise your taxable income. They are, however, added in when your tax rate is determined. The tax office forms a notional income from taxable income plus wage replacement benefits, works out the average tax rate on that, and then applies this higher rate to your genuinely taxable income.
The effect is larger the more steeply the tax tariff rises in your income band. In the middle of the progression zone — roughly between €20,000 and €60,000 of taxable income — the rise is particularly steep, which is exactly where most short-time work cases sit. At very high incomes near the top rate the effect largely disappears, because the marginal rate is constant there anyway.
A fully worked example
Take the childless employee in tax class I on €3,500 gross per month again. She is on 50 per cent short-time work for six months and receives around €626 of allowance per month during that time, roughly €3,756 in total. Her annual gross falls from €42,000 to €31,500, and her taxable income to around €23,400. The regular income tax on that would be about €2,427.
With the progression proviso the tax office first calculates the tax on €23,400 plus €3,756, that is around €27,140. That produces an average tax rate of roughly 12.6 per cent. This rate is then applied to the actual €23,400 and yields around €2,951 of income tax. The difference to the wage tax actually withheld is therefore about €520 — and precisely that sum falls due as a back payment. The short-time work calculator shows your own annual allowance total directly in the results panel.
The obligation to file a return
If wage replacement benefits exceed €410 in a calendar year, § 46 (2) no. 1 EStG creates an obligation to file an income tax return. With short-time work that threshold is passed practically always — €410 corresponds to less than a single benefit month in the example above. Filing is therefore not optional but mandatory, and the tax office learns about the allowance regardless: your employer reports the amounts in line 15 of the electronic wage tax certificate.
Simply not filing only postpones the problem and risks late-filing surcharges. The better route is the opposite one: prepare the return early in the year, learn the actual back payment and set the amount aside deliberately. In many cases the return even softens the back payment, because work-related expenses, insurance contributions or tradesperson services are offset against it.
How to prepare
A usable rule of thumb: set aside roughly ten to fifteen per cent of the allowance you receive for the later back payment. On €3,756 of allowance that would be around €380 to €560 — in the example above, exactly the right order of magnitude. Anyone budgeting tightly during short-time work should treat this amount as a fixed monthly item rather than hunting for it the following year.
Two further points help. First, check whether a change of tax class within a marriage makes sense — it does not change the annual tax, but it does change the burden during the year and the size of the allowance. Second, compare your regular net in the gross-to-net calculator with your payout during short-time work, so that you do not underestimate the liquidity drop and the later back payment twice over.
Conclusion
The progression proviso does not make short-time work allowance taxable, but it makes the rest of your income more expensive. Expect a back payment in the low to middle three-figure range per half-year of short-time work, file the mandatory return in good time, and put the reserve aside from the start. Your concrete annual allowance total — the figure that lands under the progression proviso — is shown in the short-time work calculator. These notes are general in nature and do not replace individual tax advice.