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Trailer loaded with hay bales in a German field
Law13/07/2026 · 4 min read

Roadworthiness testing and registration for agricultural trailers: what applies?

Agricultural trailers are subject to some different rules than car trailers – knowing these differences avoids unnecessary cost and delay when registering.

Green plates for farm and forestry vehicles

Trailers used exclusively in farm or forestry operations can, under certain conditions, receive green number plates and are then exempt from vehicle tax. This requires predominant use within your own farm business.

Inspection intervals

Agricultural and forestry trailers are subject to partly extended inspection intervals compared to car trailers, depending on the permitted top speed and intended use. Check the exact deadlines for your model before first registration.

Mind the speed limit

Many agricultural trailers are rated for 25 or 40 km/h and marked accordingly. Exceeding this top speed isn't just an offence – it can also exceed the technical limits of the braking system and tyres.

Conclusion

Before buying an agricultural trailer, check whether agricultural registration with green plates applies to you, and note the inspection intervals for your intended use. When in doubt, your registration office can advise on the rules that apply to your business.

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