Yes. The company where you work determines the maximum price for the bike. It is important that this is adhered to.
If you have your eye on a bike that is more expensive than the maximum amount prescribed by the company where you work, you unfortunately cannot pay the difference. If you have set your sights on a more expensive bike, it is best to contact your HR department to discuss the possibilities.
Good to know: even if the company where you work 'only' facilitates the lease bike scheme, you will save up to 35% less with a bike from the company than with a private purchase! This has to do with the tax benefit of a company bike.