A letter from your landlord.
It's never good news.
Check your Costs
Everyone pays. Almost nobody checks.
SimpleTransparentFair
Five pages.
Zero understanding.
Numbers, legal clauses, allocation keys.
You read — and understand nothing.
You put it aside. And pay.
What if you could simply have it checked?
Did you know?
0 out of 10
utility bills contain errors
€0
average refund
0 M
tenant households affected
Every year, millions of tenants in Germany overpay. The reasons vary — but the solution is simple.
Does this sound familiar?
Are the janitor services listed correctly?
Janitor costs are a classic billing error. Often, administrative tasks or repairs are billed as janitor services — but that's not allowed. Only ongoing maintenance and upkeep can be charged to tenants.
Calculate savings →Are you paying for gardening that never happens?
Be honest: when was the last time you saw someone working in the garden? Gardening can only be billed if it actually takes place.
Calculate savings →Are heating costs calculated by actual usage?
By German law (Heizkostenverordnung), at least 50% of heating costs must be based on actual consumption. In practice, this isn't always done correctly.
Calculate savings →Is the property tax allocated correctly?
Property tax (Grundsteuer) may be passed on to tenants — but only the actual share. A common error: the full amount is charged instead of the proportional share.
Calculate savings →Is the small repairs clause applied correctly?
Small repairs can be passed on to tenants via the lease — but only up to a certain amount per case and per year. The limit is usually 75–100 € per repair.
Calculate savings →Are you being charged for administration costs?
Administration costs generally cannot be passed on to tenants — they are not among the 17 allowable operating cost types under § 2 BetrKV (German Operating Costs Regulation).
Calculate savings →How it works
Get your full report in just 3 steps.
NeKo Check
SimpleTransparentFair
1
Upload
Photo or PDF of your utility bill. 30 seconds.
2
Analysis
Every line item is checked against current German case law.
3
Report
Clear report with all errors found and a ready-to-send objection letter.
This is what your result looks like
Plain language, not fine print. Click to browse.
Beispiel ansehen
One-time price. No surprises.
Cheaper and faster than any alternative.
€19,99
incl. VAT · Results within 24 hours
- Complete check of all line items
- Detailed PDF report
- Template objection letter
- German federal court rulings cited
- Deadline reminder via email
- GDPR compliant · Data encrypted
Money-back guaranteeWe don't find an error? You get 100% back. Zero risk.
GDPR compliant
SSL encrypted
Data deleted after review
Servers in the EU
Frequently Asked Questions
What happens if you don't find any errors?
You get a full refund. No risk for you.
Is this legal advice?
No — we highlight irregularities based on published case law. The final assessment is up to you or a lawyer.
How long does the review take?
You'll typically receive your report within 24 hours.
Which bills can you check?
We check Nebenkostenabrechnungen (utility cost statements) for rental apartments in Germany. Commercial or WEG statements are not yet supported.
Do I have to file the objection myself?
Yes, but we provide a ready-to-send template letter with all the findings. You just need to send it.
How secure is my data?
Your documents are transferred encrypted and deleted after the review. Fully GDPR compliant.
Learn more
Our guide covers everything you need to know about your rights as a tenant in Germany.
The 5 most common errors in German utility bills
Fairness starts with one click.
Find out within 24 hours if you're overpaying. If we find nothing — money back.