I think the best way is to first look at things which prevent uptake of cycling to work. Secure bike storage is a must, the places which do this best in my experience provide a covered bike shed with a lockable entrance. All staff members can get a key (sometimes with a small deposit, sometimes not) allowing them access and the bikes are covered and protected from the elements.
Providing showers is great, but unless you have somewhere to change and store clothes this is less than ideal and most people won't bother, and this has to be of good quality and in sufficient quantity that everyone can get to work on time and get changed/shower if needed without long queues forming. I've worked in a place where there was a shower in the disabled toilet, but there were about 8 of us who cycled in, all starting around the same time and inevitable someone decided to use the disabled toilet to have a sh!t at that time so there would be a queue at least once or twice a week.
The bonus of providing infrastructure like this is that it can serve more than one purpose, it can allow you to encourage people to take a longer lunch and go for a run or to the gym and freshen up when they get back.
In terms of incentives, there are a number of things you can do, be wary as mentioned of indirect discrimination, but you could for example partner with a local bike shop and offer free servicing once every six months / year if you cycle in at least once a week. I think financial incentives could work, but you could encourage people other ways as well, reduce the amount of parking in the office so there isn't quite enough for everyone, and plant a garden where some of it used to be for example.
You could also add in some competitions around health and wellbeing, with points for cycling into work as part of the participation - there could well be a financial incentive there overall, most points / most improved wins a voucher kind of thing.
Providing showers is great, but unless you have somewhere to change and store clothes this is less than ideal and most people won't bother, and this has to be of good quality and in sufficient quantity that everyone can get to work on time and get changed/shower if needed without long queues forming. I've worked in a place where there was a shower in the disabled toilet, but there were about 8 of us who cycled in, all starting around the same time and inevitable someone decided to use the disabled toilet to have a sh!t at that time so there would be a queue at least once or twice a week.
The bonus of providing infrastructure like this is that it can serve more than one purpose, it can allow you to encourage people to take a longer lunch and go for a run or to the gym and freshen up when they get back.
In terms of incentives, there are a number of things you can do, be wary as mentioned of indirect discrimination, but you could for example partner with a local bike shop and offer free servicing once every six months / year if you cycle in at least once a week. I think financial incentives could work, but you could encourage people other ways as well, reduce the amount of parking in the office so there isn't quite enough for everyone, and plant a garden where some of it used to be for example.
You could also add in some competitions around health and wellbeing, with points for cycling into work as part of the participation - there could well be a financial incentive there overall, most points / most improved wins a voucher kind of thing.