12-week plan for your start-up

Jupiter ERP editorial teamAs of: 24 October 2026

Contents

Weeks 1 to 4
Weeks 5 to 8
Weeks 9 to 12

Laptop and notebook on a bright café table

In short

This template splits twelve weeks into planning, registrations, finances, and go-live. Add dates and tick off milestones. Complements the 12-week founding checklist article.

Weeks 1 to 4 Link to this section

In the planning phase there are no mandatory registrations yet. Use the week as buffer for advice and documents.

Week 1: offer, target customer, pricing logic in writing
Week 2: tax advisor appointment, revenue forecast
Week 3: decide freelance (Freiberuf) or trade (Gewerbe)
Week 4: six-month budget, document folder

Weeks 5 to 8 Link to this section

Authorities and banks work in sequence. Allow waiting time for your tax number (Steuernummer).

Week 5: trade registration (if required)
Week 6: tax registration questionnaire (ELSTER)
Week 7: wait for tax number, business bank account
Week 8: clarify health insurance, start Jupiter ERP trial

Weeks 9 to 12 Link to this section

Go-live means a compliant invoice and documented payments. Test internally first.

Week 9: contracts, privacy policy, legal notice (Impressum)
Week 10: contacts and invoice number range in the tool
Week 11: review test invoice PDF
Week 12: first customer invoice, payment routine

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