Finite-commitment total

Level 2 · Foundations⚙ Method

Read firstRunning costs

Used byCapitalization factor (~200–300×)

The finite-commitment total is the full euro sum a recurring monthly cost adds up to over a fixed number of years: monthly amount x 12 x years. It converts an ongoing obligation — a lease, a loan installment, a subscription — into one number that shows the real size of the commitment, not just the monthly figure on the contract.

Why it matters

Many German contracts carry a Mindestlaufzeit (minimum contract term): a Zeitmietvertrag (fixed-term rental agreement), a Mobilfunkvertrag (mobile phone contract), and a Leasingvertrag (lease agreement) all bind the signer to a monthly payment for a set number of years, not indefinitely. The monthly figure looks manageable on its own; the finite-commitment total shows what it actually adds up to across the whole binding period.

The calculation builds directly on running costs — the recurring monthly expense of holding or using something — and turns that open-ended flow into a fixed, comparable number. That total is the raw input a capitalization factor later uses to weigh a stream of payments against a lump sum or against an alternative with a different time horizon.

The method

1. Identify the monthly amount of the commitment — the recurring running cost already established for the contract or purchase.
2. Determine the fixed duration in years — the contract's minimum term, the remaining loan period, or the planned holding period.
3. Multiply the monthly amount by 12 to get the annual total.
4. Multiply the annual total by the number of years to get the finite-commitment total.

This is a plain arithmetic sum, not a discounted one. It answers "how much cash moves over this period," not "what is that cash worth today" — it ignores the time value of money and inflation.

Worked example

A rented flat carries running costs of €1,170/month: Kaltmiete (cold rent, excluding utilities) of €900, Nebenkosten (ancillary costs — heating, water, building upkeep) of €200, and electricity of €70. The tenant signs a Zeitmietvertrag (fixed-term rental agreement) with a 3-year minimum term.

Step	Calculation	Result
Monthly amount	—	€1,170
Annual total	€1,170 x 12	€14,040
Finite-commitment total	€14,040 x 3	€42,120

Over the 3-year term, the tenant is committed to €42,120 in housing costs — a figure the monthly rent listing never states directly. Comparing this total against a different flat with a shorter or longer minimum term, or against another housing arrangement entirely, needs this one comparable number rather than two mismatched monthly figures.

Check yourself

A mobile phone contract (Mobilfunkvertrag) costs €25/month, with a minimum term of 2 years. What is the finite-commitment total?

A leasing contract (Leasingvertrag) costs €300/month for a fixed 3-year term. Someone calculates the finite-commitment total as `€300 x 3 = €900`. What is wrong with this calculation?

Nothing — €900 is the correct finite-commitment total.It never multiplies by 12, so it treats the monthly amount as if it were paid once per year; the correct total is €300 x 12 x 3 = €10,800.It should divide by 12 instead of multiplying, since the term is given in years.

Which of the following are true about the finite-commitment total? (Select all that apply.)

It equals the monthly amount multiplied by 12 and by the number of years.It ignores the time value of money — it does not discount future payments to what they're worth today.It automatically adjusts for inflation over the commitment period.It can be computed from the monthly amount alone, without knowing the contract's duration.

A fixed-term rental agreement (Zeitmietvertrag) has running costs of €950/month and a minimum term of 4 years. What is the finite-commitment total?