By the end of 2025, 3,804 people in Hesse were validly registered under the Prostitutes Protection Act — a narrow increase compared to 3,798 in the previous year and roughly one in nine of the approximately 32,500 registrations nationwide. However, this figure says nothing about how many of them are recorded with the tax office for tax purposes. This is because registration with the regulatory authority and registration with the tax office are two completely separate processes in Germany, with different forms, different authorities, and different consequences.
Hesse has a special feature that doesn’t exist in northern Germany: a daily tax advance payment collected through the establishment. What it is, what it isn’t, and what other levies are due in 2026 — here’s an overview.
Two Registrations, Two Authorities, Two Logics
The Regulatory Authority: Registration Certificate
Responsibility for registration under the ProstSchG in Hesse depends on the population size. According to the Hesse ProstSchG Jurisdiction Regulation of January 24, 2018, in municipalities with 7,500 or more inhabitants, the mayor (or deputy mayor) is responsible as the local regulatory authority, and below that, the district administrator is responsible as the district regulatory authority. Additionally, districts can assume the task by public law agreement — the Groß-Gerau district, for example, has done so since October 2020 for ten municipalities. Which authority is responsible for you cannot be said in general terms; your municipal administration will know.
This part involves fees but no taxes. In Frankfurt am Main, for example, the regulatory office charges €32.00 for consultation under § 7 ProstSchG, €15.00 for the registration certificate, and €15.00 for an alias certificate; the health authority bills health consultation separately.
The Tax Office: Tax Number
Independently of this, you must register your activity for tax purposes — using the „Questionnaire for Tax Registration,“ which is processed electronically via ELSTER. The tax office then issues a tax number. Data from the ProstSchG registration is forwarded to the tax authorities; anyone registered but not recorded for tax purposes will sooner or later be discovered.
Hesse has 28 tax offices. The Higher Financial Directorate Frankfurt am Main oversees them with specialist and service authority; as the only remaining mid-level authority of this kind in Hesse, it is also responsible for personnel recruitment. Tax investigation is not located at every office but at certain specialized tax offices — for the Frankfurt offices, for example, at the Frankfurt am Main I Tax Office. The allocation is regulated in a jurisdiction regulation that has been amended several times; you can best inquire about the current version directly from the tax office.
The Düsseldorf Procedure: €25 per Day, and Still a Declaration Required
Hesse is among the states that apply the so-called Düsseldorf Procedure. Behind this lies an agreement by the highest financial authorities of the federation and the states from 2006 to permit the procedure as a permissible taxation method. There is no law for this — and that is the core of the criticism against it.
In a report request in the Hesse State Parliament (18th electoral period, Drs. 18/2316), the procedure is described as follows: The tax investigation offices of the tax offices collect a flat-rate tax advance payment of €25 daily from the operators of prostitution establishments for the people working there. The establishment deducts the amount per day of presence, remits it to the tax office, and keeps a list of participating people. Nationwide, the rates vary by state between approximately €5 and €30.
What the Flat Rate Does — and What It Doesn’t
Three points are regularly misunderstood:
- It is a prepayment, not a settlement. The amounts paid are credited against the tax later assessed. If your actual tax liability is below this, a refund claim arises; if it is above, you pay the difference.
- The tax return remains mandatory. Participation does not change either the obligation to register for tax purposes, the obligation to keep records, or the requirement to file annual declarations.
- Sales tax is not settled by this. The Münster Finance Court decided on December 17, 2024 (15 K 40/21 U) that participation in the Düsseldorf Procedure is irrelevant for sales tax purposes — it is treated as a special form of income tax prepayment and does not replace a sales tax advance declaration.
If you work several days a week, you should calculate what €25 per day means over a year: with 150 working days, that’s €3,750 in prepayment. This can be too low — or significantly too high, especially in weak months. The same tension is described in the article on the Saxon daily rate, which is also due on slow days.
How Uniformly Is This Handled in Hesse?
Here, honest uncertainty begins. The Hesse Ministry of Finance — unlike, for example, Rhineland-Palatinate with its public information sheet — does not publish an easily findable current description of the procedure and rate. The Frankfurt advisory center Doña Carmen e.V. has reported for years on inconsistent practice among Hesse’s tax offices and criticizes tax audits in Frankfurt brothels in particular, most recently in April 2024. These accounts come from an advocacy group and are not confirmed by authorities; however, the finding that practice varies between offices is consistent with the fact that the procedure is not legally regulated anywhere.
Practical consequence: Don’t rely on what applies in another establishment or another city. Ask your responsible tax office whether and at what rate the procedure is applied, and get a receipt for every payment — the receipt is your proof for the credit. That Hesse works differently from the north is shown by the comparison with Hamburg, where no daily flat rate is collected, but instead a report to the tax office applies, and with Brandenburg, where the daily rate ends exactly at the state border.
Three Types of Tax That Together Create the Burden
Income Tax
Independent sexual services are treated as income from business operations under § 15 EStG — the Federal Tax Court has thereby abandoned decades of contrary case law. The basic exemption for 2026 is €12,348 for single people (2025: €12,096). Above that, the progressive rate applies. What matters is the profit, not the revenue: room rent, advertising, work materials, travel costs, hygiene items, tax advice, and continuing education reduce the tax base if documented.
The return for a year must generally be filed by July 31 of the following year (§ 149 para. 2 AO); with tax advice, the deadline extends to the end of February of the year after next (§ 149 para. 3 AO).
Business Tax — in Hesse a Matter of Postal Code
Business tax is the only one of the three taxes whose amount is determined by the municipality. Natural persons have a basic exemption of €24,500; the tax rate of 3.5% is applied to the profit exceeding this, and the resulting base amount is then multiplied by the municipal rate multiplier.
The range within Hesse is considerable. According to the IHK Frankfurt’s real estate tax survey as of March 2026, Frankfurt am Main is at 460%, Wiesbaden also at 460%, Darmstadt at 459%, Kassel and Offenbach at 440% each — and Eschborn at 330%, the lowest rate in the IHK district. The binding source is always the rate multiplier statute of the respective municipality; the IHK tables are a good first orientation but do not replace a look at the official gazette.
A calculation example with €40,000 profit:
- Base amount: (€40,000 − €24,500) × 3.5% = €542.50
- Frankfurt (460%): €2,495.50 business tax
- Eschborn (330%): €1,790.25 business tax
Crucially, business tax under § 35 EStG is credited against income tax — standardized at four times the base amount, here up to €2,170, limited to the business tax actually paid and the proportional income tax. Up to a rate multiplier of around 400%, business tax is thereby largely neutralized. In Eschborn, the example would result in practically no additional burden, but in Frankfurt a difference of about €325. For those who can freely choose the location of their business premises anyway, this is a factor — those working in a prostitution establishment with permission under § 12 ProstSchG rarely have this choice in practice.
Sales Tax
Sexual services are subject to the standard rate of 19%. The small business exemption under § 19 UStG has applied since 2025 to prior-year revenue of up to €25,000 and current revenue of up to €100,000 — those who stay below this do not show sales tax and in return cannot deduct input tax. If the €100,000 threshold is exceeded in the current year, small business status ends immediately from the revenue with which the threshold is exceeded.
For room rental: The reduced tax rate for accommodation does not apply where there is no accommodation but rather the provision of working spaces (BFH, judgment of August 22, 2013 — V R 18/12).
When the Establishment Is Considered the Service Provider
A decision by the Federal Tax Court on April 30, 2025 (XI B 33/24) has sharpened a question relevant for studio and club arrangements throughout Germany: If an establishment advertises sexual services itself on the Internet and thereby makes its own service promise, it owes sales tax on these services — even if the women working there are self-employed. The BFH saw no double taxation because the establishment is entitled to deduct input tax on the remuneration paid to sex workers.
For you, this means: whoever actually appears to the public determines who the revenue is attributed to. If an establishment advertises you, sets your fee, and collects it, the construction of „self-employed“ is not automatically stable from a tax perspective — and even less so from a social security perspective. Contracts, your own advertising, and your own price setting are more than formalities in this question.
Records and Audit Pressure
There is no cash register requirement for cash income. Under § 146 AO, individual recording can be dispensed with if goods or services are sold for cash to a large number of unknown persons — a point that advisory centers regularly invoke in disputes with tax investigation. What remains is the obligation to maintain a comprehensible, complete, and timely record of daily income and business expenses. A carefully kept cash book with daily totals is not a luxury but the difference between an audit with documentation and an assessment without.
That audits do happen is evidenced by Hesse’s figures: For 2025, the Higher Financial Directorate and Finance Ministry report additional revenue from business audits and tax investigation of around €2 billion — approximately €1.25 billion from business audits and €810 million (provisional) from tax investigation, compared to €1.34 billion and €253.4 million in 2024. Added to this were fines of just over €9 million. Audits in the sex work sector often run as joint operations of multiple authorities; what this concretely means for those present is described in the article on a joint inspection in over 60 Hesse venues.
Social Insurance: None of This Runs Automatically
This is where the differences between federal states end – social insurance is federal law and in Hesse is identical to the rest of the republic. The difference lies in the fact that self-employed sex work, unlike many other trades, is not subject to automatic coverage.
Health Insurance
Insurance is mandatory – but you have to arrange it yourself, either through statutory voluntary or private insurance. In the statutory fund, as of 2026, there is a minimum assessment basis of €1,318.33 per month. Depending on the additional contribution and choice of sickness benefit, this results in a minimum contribution in the range of €270 to €286 per month, including long-term care insurance (around €55 of that for those without children). There is a cap at the contribution assessment limit of €5,812.50 per month.
What is important is the mechanism under § 240 para. 4a SGB V: Contributions are initially set provisionally on the basis of your last income tax assessment and only become final after submission of the assessment for the respective year. If you paid only the minimum contribution in a good year, the difference will be recalculated later. This recalculation often comes years later and hits a potentially worse year – setting aside money for this is not caution, it is planning.
Pension Insurance
There is no mandatory insurance in the statutory pension insurance for self-employed sex workers. Voluntary contributions are possible and range from €112.16 to €1,571.70 per month in 2026, at a contribution rate of 18.6%. Contributions for a year can be made up until March 31 of the following year. Contributions are 100% tax-deductible as retirement provision expenses – so the state bears a noticeable share depending on your tax rate. Alternatively, a Rürup pension is an option.
Just five years of contribution history is enough for your own pension entitlement; if you fall just short of that, you should check it before withdrawing.
Employed Instead of Self-Employed
In a dependent employment relationship, the situation is different: Then social insurance is mandatory, the employer pays income tax and contributions, and the Düsseldorf procedure is moot – it explicitly applies only to the self-employed. How the burden without the daily allowance breaks down can be easily understood using the example of Saxony-Anhalt, where there is no fixed deduction, but instead the full bill comes due.
Four Things You Can Concretely Plan
- Set a reserve ratio. A rule of thumb of 30 to 40% of profit for income tax, business tax, and social insurance is conservative, but it prevents the typical situation where a tax assessment and a contribution recalculation arrive at the same time.
- Collect receipts for allowances. Every daily allowance remitted through the business is a prepayment on your tax account – without proof, enforcement of the credit is difficult.
- Document business expenses from the start. The tax office will estimate if in doubt, and estimates rarely turn out generous.
- Clarify responsibilities in writing once. A brief call to the tax office asking whether and how the Düsseldorf procedure applies to you is more unpleasant than a year of uncertainty – but shorter.
Where to Get Support
In Hesse, PIA Hessen (operated by FIM, with offices in Darmstadt, Frankfurt, Kassel, and Marburg, multilingual), Doña Carmen e.V. in Frankfurt, TAMARA of Diakonie Frankfurt, and sichtbar in Kassel provide advice. These offices do not provide tax advice in the sense of the Tax Advice Act, but they know local practice and can refer you to tax advisers familiar with the industry.
For binding information on taxes, the responsible tax office or a tax adviser remains the right contact; for questions about registration, the regulatory authority of your municipality or district. That improvements are seen as necessary for the ProstSchG overall is no secret: The evaluation report of the Criminological Research Institute of Lower Saxony, which was submitted to the Bundestag on June 24, 2025, rates health protection and advice positively but criticizes registration and ID requirements as stigmatizing and deterrent. A legal basis for the special tax treatment via the Düsseldorf procedure has not yet been created.