NSTS do not dictate to the examiner what they should charge for the test, this is purely between the examiner and the machine owner.
Factors will be the complexity of the machine along with its size, how far the examiner has travelled. Any repairs, rectifications and spares needed to bring the machine up to requirements are not considered as costs of the test.
The NSTS registration fee currently costs £25.00. The cost of the test itself is determined on a case-by-case basis by each approved NSTS Sprayer examiner – who will invoice the machine owner directly.