Prepaid or contract: which is cheaper for you? (2026)
Cost control vs. convenience, flexibility vs. price per GB — find out whether prepaid or a fixed-term contract fits your usage better.
The fundamental difference
With prepaid you top up credit and pay in advance — you only spend what you put in. With a fixed-term contract you use the plan and pay monthly in arrears by invoice, usually with a fixed commitment.
This creates two philosophies: prepaid means full cost control and no commitment; the contract means convenience, often more allowance, and usually a lower price per gigabyte.
Both run on the same networks. The decision is not about quality but about your usage and how much you value control versus convenience.
When prepaid is the better choice
Prepaid pays off if you want to strictly cap spending, call and surf little or irregularly, or do not want a long contract. It is also ideal for children, a second phone or a temporary stay in Germany.
Since you only use what you topped up, there are no nasty surprises on the bill. When credit or data runs out, it is throttled or stopped — instead of running on expensively.
The downside: per gigabyte, prepaid is often more expensive than a contract with lots of data. If you regularly need a lot of data, prepaid usually costs more in the end.
When a contract is worth it
A fixed-term contract fits if you regularly use a lot of data, value convenience and do not want to keep topping up. Large data packages are usually cheaper per gigabyte on a contract than on prepaid.
Contracts often include extras like 5G at no surcharge, more inclusive volume or optionally a device. In return they tie you in at first — typically 24 months.
After the minimum term the contract is cancellable monthly. That lets you compare and switch regularly without being stuck for long.
How to do the honest math
First estimate your real monthly data usage. If you are often on Wi-Fi, a few gigabytes often suffice; if you stream on the go, you need much more. That number is the basis of any decision.
For prepaid, scale your typical monthly top-ups up to a year and compare with the annual cost of a suitable contract. Only then do you see what is truly cheaper for your behaviour.
Include hidden factors too: does prepaid credit expire if unused? Is there a switching bonus on the contract, or a fee for number portability?
Switching and staying flexible
You can take your number both ways — from prepaid to contract and back. The fee is legally capped at a few euros and is often refunded as a bonus.
Many modern plans offer an eSIM so you can switch quickly without waiting for a card by post. That lowers the barrier to regularly choosing the cheapest offer.
Your usage changes over time. Check once or twice a year whether your current solution — prepaid or contract — is still the cheapest for you.
Practical tips
- First estimate your real monthly data usage — it determines everything.
- Scale prepaid top-ups to a year and compare with a contract’s annual cost.
- Choose prepaid for strict cost control, contracts for high data volume.
- Watch whether prepaid credit expires if unused.
- Use eSIM and number portability to switch flexibly.
Common mistakes to avoid
- Choosing prepaid even though you need a lot of data — often pricier per GB.
- Signing a long contract even though you use little and irregularly.
- Not comparing the price per gigabyte between prepaid and contract.
- Overlooking expiring prepaid credit.
- Not checking for cheaper options after the minimum term.
Checklist before you compare
- Estimated real monthly data usage.
- Classified your need for cost control vs. convenience.
- Calculated prepaid annual cost against contract annual cost.
- Compared the price per gigabyte of both options.
- Checked credit expiry and extra costs.
- Confirmed network coverage for the chosen option.
Frequently asked questions
Is prepaid always cheaper than a contract?
No. For low usage yes, but per gigabyte prepaid is often more expensive. If you need a lot of data, a contract is usually cheaper.
Do I get the same network on prepaid as on a contract?
Yes. Prepaid and contract use the same networks. Quality depends on the network, not the billing type.
Can I switch from prepaid to contract and keep my number?
Yes, both ways. Number portability is your right and costs only a few euros, often refunded as a bonus.
Does my prepaid credit expire?
Depending on the provider, credit can expire after long non-use. Check the terms before buying.
Who is prepaid especially suitable for?
For children, second phones, low or fluctuating usage, and anyone who wants to strictly cap spending.
Compare matching plans
What we compare for you:
- Data volume
- Network
- Term
- 5G
Free · no obligation · no extra cost for you
Ad / Affiliate: This page includes comparison tools and links to CHECK24. We receive a commission when you complete a contract. No extra cost for you.
More articles
Understanding your mobile bill: base fee, data & roaming
What base fee, data bundle, SMS and abroad costs mean — and how to avoid surprises.
Switching mobile contracts: keep your number & save
Number porting, notice period and the best time to switch — step by step.