Software for professional firms in Berlin
STAK Practice
Engagement letters, rate cards and budgets, conflict checks, timers and timesheets, pre-bills and retainers, and a client portal to sign and pay.
One main app is free forever. AI uses prepaid credits; Receptionist is a separate paid add-on. Pricing
34 languages
EUR

AI reads an equipment plate from a photo and turns a fault description into price-book lines for you to check. It runs on prepaid AI credits.
STAK in Berlin
Berlin is the capital of Germany. Here is what STAK uses for Germany.
- Currency
- Euro (EUR)
- VAT
- 19% standard rate
- Tax authority
- Tax office (Finanzamt)
- Cash register law
- Germany requires a certified till (KassenSichV: a TSE and the DSFinV-K export). STAK does not offer that yet, so cash sales on STAK POS are not available in Germany yet.
- Language
- 34 languages, German included
- Time zone
- Europe/Berlin
The standard VAT rate is 19%, administered by the Tax office (Finanzamt). STAK’s tax pack keeps the rates with the date each one applies from, so every invoice is taxed at the rate in force on its date. Return data is prepared for you; filing stays with you and your adviser.
What your practice gets
Sell
- Engagement letters, rate cards and budgets
- Pre-bills, retainers and hour banks
- Client portal to sign, pay and follow hours
- Multi-language invoices with pay links
- Contracts and releases signed online
- An enquiry form for the firm’s website, conflict-checked before anyone reads it
- Matter notes, dictated or typed, with their minutes recorded as time in one step
Desk
- Conflict checks
- Timers and weekly timesheets with professional rounding
- WIP and unbilled register with ageing and lock-up days
- Deadline board for recurring filings
Customers
- Customer list and history
- Campaigns, segments and journeys on WhatsApp and email
Team
- Till, kitchen and staff-app logins free
- Shifts, clock-in, leave and tip pools
- Payroll with the bank file and payslips in eight languages
- Offers, contracts and recruiting
Money
- Card and local payments through your own payment account
- Owner insights and reports
- Books, VAT and bank matching
- VAT and e-invoicing as your country requires
Start free, pay when you grow
We suggest starting with Projects & Field Service free forever. Cashiers, waiters, kitchen staff and drivers are free; you only pay for back-office users.
Prices are in US dollars; every detail is on the Pricing.
Free tools that help
Questions people ask
What does STAK do for professional firms in Berlin?
It covers Engagement letters, rate cards and budgets; Pre-bills, retainers and hour banks; Client portal to sign, pay and follow hours; Multi-language invoices with pay links; Contracts and releases signed online and more, all built in and connected to the same customers, stock and books.
Is STAK free for a practice?
Yes. Projects & Field Service is free forever. Paid plans count back-office users only: Standard is USD 16 a user a month billed yearly (USD 20 monthly) and Custom USD 31 (USD 39 monthly). Till, kitchen, staff-app and driver users are free; you see the price in your own currency on the pricing page.
How does STAK handle tax in Berlin?
The standard VAT rate is 19%, administered by the Tax office (Finanzamt). STAK’s tax pack keeps the rates with the date each one applies from, so every invoice is taxed at the rate in force on its date. Return data is prepared for you; filing stays with you and your adviser.
Can I use STAK POS as my cash register in Germany?
Not yet. Germany requires a certified till (KassenSichV: a TSE and the DSFinV-K export). STAK does not offer that yet, so cash sales on STAK POS are not available in Germany yet. Online sales, invoices, stock, bookings and accounting work.
Which currency does STAK use in Berlin?
EUR. Every amount is stored as a whole number of the smallest unit, so an invoice and the books never differ by a rounding error.
Do I need a payment account in Germany?
You connect your own payment account and bank with a provider that serves Germany, so your money reaches you directly and STAK does not hold it. Which payment methods you can offer depends on the provider you connect.
Which languages does STAK work in?
Owner screens run in 34 languages; staff screens in 34 languages and the online store in 34 languages.
Other businesses in Berlin
Start STAK Practice free
Reserve your free workspace. One main app is free forever.
- No card needed
- Free forever