Common Mistakes

Starting without a financial plan

Many self-employed people dive into the adventure of self-employment without first calculating income, expenses or a buffer. This often ends in avoidable bottlenecks and stress. Instead, forecast your cash flow monthly with simple tools.

• List all fixed costs (rent, insurance) and variable expenses.
• Estimate your income realistically (e.g. based on recent months)
• Build in a buffer of 3–6 months' salary to catch unforeseen events

Forgetting customer acquisition

Steady new customers ensure revenue flow, but many founders prioritise current projects and let acquisition slide – until new orders dry up. Dedicate fixed times to actively searching for customers to balance out fluctuations.

• Set aside a fixed number of hours weekly for acquisition: e.g. 2h for LinkedIn contacts and 2h for personalised emails
• Track successes: Who reacts to your posts? Who responds to your emails and shows interest?
• Build a list of 30–50 potential customers and maintain it continuously

Tax liability and advance payments collide

Low Steuervorauszahlungen (advance tax payments) in the start-up year come back to haunt you the following year through high back payments that collide with the new, usually higher advance tax payments and eat up your liquidity. The tax office bases the required advance tax payments on the last tax assessment, which can grow considerably with good growth. Adjust your advance tax payments if in doubt and build up reserves.

• Reserve 20–30 percent of your profit monthly for taxes
• Review your assessments and simulate scenarios that could occur
• Apply for adjustments with the tax office as soon as income rises or falls

Mixing private and business finances

Business and private receipts and accounts easily get mixed up, which complicates bookkeeping and jeopardises deductibility during audits. Missing evidence triggers expensive back payments during an audit and possibly penalties. Strictly separate to avoid chaos!

• Open a separate business account (free at many banks)
• Scan every receipt digitally immediately
• Categorise expenses: private or business?

Postponing bookkeeping or DIY chaos

Without structure, bookkeeping easily leads to errors with Umsatzsteuer (VAT) and expenses. Dedicate fixed times to it and use automation.

• Schedule 30 minutes weekly for income/expenses
• Use software instead of spreadsheets
• Get a tax advisor if in doubt

Skipping VAT

Kleinunternehmer (those using the small business exemption) exceed the 25,000-euro threshold and forget the changeover, which then brings tax back payments. Incorrect invoices without a VAT note cost you reclaimable VAT (Vorsteuer). So monitor your turnover continuously ^[1].

• Check your annual turnover monthly
• Show VAT correctly on all invoices
• Apply for the changeover on time with the tax office

Ignoring reserves

Without a buffer for illness, order slumps or revenue fluctuations, you quickly reach financial limits. Set aside systematically.