Student debt rarely comes from one big bad purchase. Usually small items add up, such as an account that is permanently overdrawn, an instalment purchase, a phone contract with a device or a credit card with part payment. If you want to avoid student debt, you need three things. First, an overview of your income and spending. Second, a small reserve. Third, the willingness to act immediately at the first sign of arrears.
The most important points at a glance
- The most common debt traps during your studies are the overdraft, instalment purchases, phone contracts with a device, credit cards with part payment and arrears on rent or health insurance.
- Monthly rate times term gives the real cost: calculate the total sum of every contract before you sign.
- State loans such as the federal education loan (Bildungskredit, 4.09% effective, variable) are usually cheaper than private loans.
- At the first reminder: sort your documents, write to your creditors and seek advice. The sooner you act, the more room you have.
Which debt traps exist during your studies?
The following overview shows why these traps become expensive and how to deal with them.
| Trap | Why it becomes expensive | Remedy |
|---|---|---|
| Overdraft | High interest, the overdrawn amount feels like your own money | Keep a reserve, check your balance every week |
| Instalment purchase | Surcharges and fixed instalments over months | Work out the total sum, save up for larger purchases |
| Phone contract with a device | Long term, the device is included in the monthly price | Buy the device and the tariff separately, check the term |
| Credit card with part payment | Interest on the outstanding amount | Only use it if you pay the balance in full |
| Arrears on rent or insurance | Reminder fees, in the worst case termination or a change of tariff | Speak to the creditor early, clarify instalment payments |
Why is the overdraft so dangerous for students?
The overdraft credit is used without an application as soon as your account goes into the red. That makes it convenient and expensive at the same time. You will find the current interest rate in your bank’s terms. It is usually well above the rate for an instalment loan.
Example with assumed interest of 12% a year: if you are permanently €500 overdrawn, you pay around €60 in interest a year (€500 × 0.12). The account shows no warning sign as long as the limit is sufficient. The danger is that being overdrawn becomes the normal state and no buffer remains in an emergency.
A small reserve in a separate account is better. How to organise your account, reserves and deadlines is explained in our article on organising your finances during your studies (in German).
What does an instalment purchase really cost?
With instalment purchases, pay-in-instalments in online shops or “buy now, pay later”, the total sum counts, not the individual instalment. Example with assumed figures: a laptop costs €900, and you pay 12 instalments of €80. The total comes to €960, which is €60 more than the purchase price.
There is also the risk that you have to keep paying instalments for months, even if your income changes. A laptop that breaks after 12 months is then still not paid off. For larger purchases, a savings goal with an amount and a date helps, as described in our article on financial goals as a student (in German).
How can you avoid student debt through phone contracts?
A phone contract often binds you for 24 months. Example with assumed figures: €35 a month over 24 months comes to €840. If a smartphone is included, you pay for the device as well and have no way to leave early.
Before you sign, check the term, the notice period and the total cost. Looking at the tariff and the device separately creates clarity: what does the tariff cost on its own, and what do you additionally pay for the device? If your income varies, short terms are safer.
Is a credit card risky for students?
A credit card is not a problem in itself, as long as you pay off the balance in full on the statement date. The trap is part payment: interest is charged on the outstanding balance, and the card encourages you to spend more than is in your account.
Set your own upper limit for monthly use and set up full direct debit if your provider allows it. If you prefer to pay only with the funds you have, use a card without a credit line.
When are student loans sensible?
A student loan may be an option if BAföG, a scholarship, a part-time job and support from your parents are not enough. In that case, compare the state offers first before considering a private loan.
| Offer | Interest | Payout |
|---|---|---|
| Federal education loan (Bildungskredit) | 4.09% effective, variable | €100, €200 or €300 a month, for up to 24 months |
| KfW student loan | 6.38% effective, variable | €100 to €650 a month |
| Private bank loan | Average of about 8.99% | Usually only with regular income |
A calculation example shows how expensive a loan can become (as of 9 October 2026): with a monthly payout of €400 over four years, the KfW student loan results in about €10,730 in interest and around €29,930 in total repayment. Your terms may differ.
More on the conditions can be found with the KfW student loan and the federal education loan of the Federal Office of Administration. Remember that BAföG is also half an interest-free loan. Repayment is capped at €10,010, and the instalment is €130 a month (BAföG FAQ of the Studierendenwerke).
Be careful with offers “without Schufa” and with advance payment: look closely at these. When making a Schufa enquiry, choose “enquiry for credit conditions” rather than “enquiry for loans”. An open loan can initially lower your Schufa score.
How do you recognise that debt is building up?
Take these warning signs seriously:
- Your account has been in the red for several months in a row.
- You only pay a bill when the reminder arrives.
- You borrow money to keep up with ongoing instalments.
- You no longer open letters from creditors.
- At the end of the month, nothing is left regularly, and you do not know where the money went.
A fixed overview of income and spending helps. How to set up a monthly budget in three steps is described in our article on budget planning during your studies (in German).
What happens if you fall behind on health insurance payments?
In private health insurance a staged reminder procedure applies. If arrears amount to two monthly contributions, the first reminder follows, and two months later the second. If one monthly contribution plus late-payment surcharges is still outstanding after that, the contract is suspended and you are moved to the emergency tariff (Notlagentarif).
The emergency tariff only pays for acute illnesses and pain, for pregnancy and maternity, and for preventive check-ups and vaccinations for children and young people. Once you have paid all arrears, you return to your old tariff. If you cannot afford your contributions, contact your insurer in advance.
When does debt counselling help?
Debt counselling helps as soon as arrears arise and you lose track. Counselling centres run by municipalities and welfare organisations often work free of charge, but clarify this before the appointment. The student services and the social counselling of your university can also be first points of contact.
This is how to proceed when reminders arrive in the post:
- Sort all documents: contracts, reminders, bank statements.
- Make a list of whom you owe how much and when deadlines expire.
- Write to your creditors, describe your situation and offer instalments you can really afford.
- Arrange an appointment with a counselling centre before you take out new loans to service old ones.
Do not ignore letters. Anyone who responds keeps room for manoeuvre, and reminder costs grow over time.
How do you build long-term financial security?
Prevention works through routines. These include a standing order into your reserve right after money comes in, a monthly look at your budget, and goals with an amount and a date. Even small amounts count, because a reserve catches the next bill without you needing the overdraft.
Once your reserve and budget are stable, that is the first step towards wealth. How to start with small amounts is described in our article on building wealth during your studies (in German).
Frequently asked questions
How much overdraft is acceptable for students?
An overdraft should only be a short bridge, not your permanent state. If the account is in the red for several months in a row, that is a warning sign. Check your bank’s interest rate and set up a reserve so that you do not need the overdraft at all.
Is an instalment purchase a good idea as a student?
Usually not, because you have to keep paying instalments for months and you pay surcharges. Work out the total sum in advance. For a laptop for €900 in 12 instalments of €80, you pay €960. For fixed purchases, a savings goal with a date is often cheaper.
Can students get debt counselling?
Yes, counselling centres are open to anyone in debt, including students. Many municipal and welfare centres work free of charge, but clarify costs in advance. You can also turn to the student services or the social counselling of your university.
Is a student loan a debt trap?
Not necessarily, but it binds you for the long term. Compare interest, payout and when repayment starts, and check state offers such as the federal education loan at 4.09% effective first. Borrow only what you really need, and plan the later instalments now.
What you should do now
- Calculate the total cost of every ongoing contract and every instalment purchase.
- Check whether your account is often in the red, and build up a small reserve.
- Set up a monthly budget and review it once a month.
- Respond to reminders immediately: write to your creditors and clarify instalment payments.
- If arrears grow, seek debt counselling early.
Related articles
- Budget planning during your studies: a monthly budget in three steps (in German)
- Organising finances during your studies: account, emergency fund and deadlines (in German)
- Setting and reaching financial goals as a student (in German)
- Pension insurance during your studies: duty, exemption and pension points (in German)
Last updated: October 2026. This guide is general information, not individual advice. The German version is authoritative.
