Bootstrapping and internal financing: prepayments, retained earnings and lean operations

What you will learn

• The difference between internal financing (Innenfinanzierung) and external financing (Außenfinanzierung).
• The four internal sources: retained earnings, cash from depreciation, provisions and freed-up assets.
• How customer prepayments and milestone billing cut the peak funding need of a project.
• When bootstrapping is the right choice and when it quietly costs more than a loan.

Explanation

Bootstrapping means building a business from its own cash flow and the founder's savings, without loans or investors. German textbooks call this Innenfinanzierung; Außenfinanzierung covers everything from lesson 3 onwards: bank loans, public loans, leasing, factoring and equity investors.

The four internal sources

• Self-financing from retained earnings (Selbstfinanzierung): profit that the owner does not withdraw. A sole trader decides this by limiting private withdrawals; a GmbH decides it by not distributing profit.
• Cash from depreciation (Finanzierung aus Abschreibungen): depreciation reduces profit but is not paid out in cash. If prices cover it, a €30,000 machine depreciated over five years keeps about €6,000 of cash per year in the business, even with zero accounting profit.
• Provisions (Rückstellungen): amounts booked for future obligations such as warranty work or a tax bill; until paid they are free cash. Mainly relevant for a GmbH with a balance sheet.
• Freed-up assets (Kapitalfreisetzung): selling unused equipment, reducing stock, collecting receivables faster.

Customers as financiers

The cheapest working capital usually comes from customers. Three tools:

• Prepayment (Anzahlung): a deposit of 20 to 50 percent at order. Normal in crafts, custom production and events.
• Milestone billing (Abschlagsrechnungen): invoices at defined stages of a project.
• Subscriptions or annual payment in advance: common in software and services.

Two German rules: a prepayment is a liability (erhaltene Anzahlungen) until you deliver, and VAT on it is due in the period you receive it, not when you deliver, so the Umsatzsteuer part is never yours to spend.

Lean operations

Every euro of start-up cost you avoid is a euro you do not have to finance. Practical rules: rent before you buy, buy used equipment where the customer does not see it, turn fixed costs into variable costs (freelancers, pay-per-use software, shared workshops), and hire only when the work exists. A lean cost base also shrinks the working-capital gap from lesson 1.

The honest cost of bootstrapping

Bootstrapping is not free. Its costs are slower growth, lost orders you could not pre-finance, discounts given for prepayment, and the founder's unpaid time. Compare them with the interest a loan would cost. If a €20,000 overdraft at 11 percent would let you take an order that earns €8,000 of contribution, the roughly €1,100 of annual interest is cheap. If outside money would only fund a nicer office, bootstrapping wins.

Worked example

Hypothetical example: a small web agency wins a project worth €24,000 net. Costs are €5,000 per month for three months (freelancers and salaries), €15,000 in total. The agency has no spare cash and would use an overdraft at 11 percent per year. Fees, taxes and VAT are excluded; interest is simplified to one twelfth of the annual rate per month on the month-end balance.

Option A: invoice at the end, payment 30 days later

Overdraft balance at month end: €5,000 (month 1), €10,000 (month 2), €15,000 (month 3), €15,000 (month 4, waiting for payment). Peak funding need: €15,000.

Interest: (€5,000 + €10,000 + €15,000 + €15,000) × 11 % ÷ 12 = €45,000 × 0.009167 = €412.50.

Option B: 30 % deposit, 40 % milestone after month 2, 30 % at delivery

Deposit €7,200 at start. Month 1: €7,200 − €5,000 = +€2,200. Month 2: €2,200 − €5,000 = −€2,800, then the milestone invoice of €9,600 is paid: +€6,800. Month 3: €6,800 − €5,000 = +€1,800. Final invoice €7,200 paid: +€9,000, which is the project profit.

Peak funding need: €2,800 for a few days at the end of month 2 instead of €15,000 for four months. Interest is close to zero, and the agency could run two such projects at once with the cash it has.

The price of option B is a negotiation; most business customers accept deposits if the schedule is in the offer from the start.

Common mistake

Practice activity

On paper: the same agency negotiates a 50 percent deposit (€12,000) at the start and the remaining €12,000 paid 14 days after delivery. Costs stay at €5,000 per month for three months. Calculate the cash balance at the end of each month, the peak funding need, and the approximate overdraft interest at 11 percent if the deficit lasts about one and a half months.

Key takeaways

• Internal financing comes from retained profit, depreciation, provisions and freed-up assets; it has no interest cost but limits speed.
• Deposits and milestone invoices can cut the peak funding need of a project by 80 percent or more.
• Prepayments are liabilities, and the VAT on them is due when the money arrives.
• Compare the hidden cost of bootstrapping (lost orders, slow growth) with the interest cost of a loan before deciding.

Next step

When internal sources are not enough, the next lesson explains how a German Hausbank decides whether to lend to you.