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Lesson 8 of 13 · Free

Financial goals and sinking funds: turning goals into monthly amounts

Turn vague wishes and irregular bills into specific goals with a deadline, a price and a monthly saving amount.

Author: Moustafa HijaziContent reviewed: 2026-10-305 min readSelf-study course

What you will learn

  • How to write a financial goal that is specific enough to plan with
  • What a sinking fund is and how it differs from the emergency fund
  • The monthly-amount formula, including what to do when you start late
  • How to rank several goals when your money does not cover all of them

Explanation

Your budget (covered in lesson 2) shows what you spend each month. Many costs, however, do not arrive monthly. Car insurance is often paid once a year, a washing machine breaks every eight to ten years, and holidays and birthdays come at fixed times. If you do not plan for them, they feel like emergencies and are often paid with an overdraft (Dispositionskredit) or a credit card.

A financial goal is a future expense with three parts: a target amount in euros, a deadline (a month and year) and a purpose. "Save more" is a wish. "€1,500 for a summer holiday by June next year" is a goal.

A sinking fund is money you set aside step by step for one known, planned expense. It is different from the emergency fund (lesson 3): the emergency fund covers the unknown, such as job loss; a sinking fund covers the known but irregular. Keeping them separate stops you from "borrowing" from your safety buffer for a holiday.

The basic formula

Monthly amount = (target amount − amount already saved) ÷ months left until the deadline

For short goals (under about three years) you can ignore interest. Savings interest helps a little, but the formula without interest gives a safe, slightly higher amount.

Three types of goals

  • Short-term (under 1 year): holiday, gifts, annual insurance premiums. Keep the money in a current-account sub-account or a Tagesgeld account (lesson 5).
  • Medium-term (1–5 years): car replacement, deposit for a flat, a course. Safe accounts or Festgeld with a matching end date; no money you need soon belongs in shares.
  • Long-term (over 5 years): retirement and wealth building. These follow other rules (see lesson 7 and the course "ETFs, Funds & Long-Term Investing").

Ranking goals

If the sum of all monthly amounts is larger than what you can save, rank them. A practical order: (1) fixed irregular bills you must pay anyway (insurance, car tax, repairs); (2) the emergency fund; (3) high-interest debt payoff (lesson 4); (4) important dated goals; (5) wishes. For low-priority goals you can move the deadline or reduce the target. Moving a deadline is a decision; missing it by accident is not.

Worked example

Hypothetical example: Lena earns a regular salary and wants to plan three things. Assumptions: no interest, no price increases, amounts in euros.

  1. Replacement car: target €9,000 in 36 months, already saved €1,800. Monthly: (€9,000 − €1,800) ÷ 36 = €7,200 ÷ 36 = €200.
  2. Holiday: €1,500 in 10 months, nothing saved yet. Monthly: €1,500 ÷ 10 = €150.
  3. Irregular annual bills: car insurance €540, car repairs €600, gifts €480, household appliances €360. Total per year: €540 + €600 + €480 + €360 = €1,980. Monthly: €1,980 ÷ 12 = €165.

Total monthly transfer: €200 + €150 + €165 = €515. Lena sets up one standing order of €515 on payday into a Tagesgeld account and tracks the three "buckets" in a simple table. When the insurance bill arrives, she pays it from the bills bucket, not from her current account.

Starting late: suppose a €2,400 goal has a 12-month deadline. Started on time, it needs €2,400 ÷ 12 = €200 per month. If Lena starts four months late with €0 saved, she has 8 months: €2,400 ÷ 8 = €300 per month, 50% more. Exclusions: interest, inflation and fees are ignored.

Bucket Target Saved Months left Monthly
Car €9,000 €1,800 36 €200
Holiday €1,500 €0 10 €150
Annual bills €1,980 / year €0 12 €165

Common mistake

Mixing sinking funds with the emergency fundIf all savings sit in one pot, a holiday quietly uses up the money meant for job loss or a broken boiler. Keep at least separate records, ideally separate sub-accounts, and do not count sinking-fund money as part of your emergency reserve.

Practice activity

On paper, list every irregular expense from the last 12 months (check your bank statements). Then plan this goal: a new laptop for €1,200 in 15 months; you already have €300. Calculate the monthly amount. Finally, add your irregular expenses and calculate the monthly amount for them.

Show solution

Laptop: (€1,200 − €300) ÷ 15 = €900 ÷ 15 = €60 per month. For the irregular expenses: add all amounts for the year and divide by 12. Example: €1,440 per year ÷ 12 = €120 per month. Put both amounts into a standing order on payday.

Limitations: prices can rise, and the formula ignores interest. For goals longer than about three years, add a safety margin or review the target once a year.

Key takeaways

  • A goal needs an amount, a deadline and a purpose; then monthly amount = remaining amount ÷ months left.
  • Sinking funds cover known irregular costs; the emergency fund covers the unknown. Keep them apart.
  • Starting late raises the monthly amount sharply, so automate the transfer on payday.
  • When money is short, rank goals and consciously move deadlines instead of missing them.

Next step

In the next lesson you will learn what SCHUFA stores about you, how your credit score is built and how to check your own data for free.

Self-check

Answer the questions, then check your answers. You can retry as often as you like.

1. You want €3,000 in 20 months and already have €600. What is the monthly amount (ignoring interest)?

2. What is the main difference between a sinking fund and an emergency fund?

3. Your saving capacity is €300 per month, but your goals need €420. Which response fits this lesson best?

Automatic self-check for your own revision. Your answers are checked in your browser and are not seen or assessed by us. It is not an exam and not a qualification.

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