There are a few models
1) competitively agianst those around you that supply
Whenever we launch a new process or product , we do a full investigation into the market , Ie what are the competiton doing ? Can we break in economically? what sets our product apart? What is the size of the market? How do we get customers to switch to us? does it fit in with what we currently do and are there exisiting customers to mine?
If you dont do all this , you fly blind.
2) A factor applied to material costs : 5x cost of inks and media seems to work well
3) Complicated working out of costs , indirect costs etc etc and applying a margin to that (can take longer to work out a quote than the job can take)
4) A little less than competing technologies (like screening/die cutting)
5) What the market can bear
6) A combo of all of the above
There is no fixed formula however , for example the guy wanting 30 stickers die cut will pay a huge amount more than a co wanting 10 000 – the 30 off is more profitable per unit , but is mickey mouse and unless you charge really exhorbitiant prices , you might find , even at REALLY high prices , you still make no money.
Be aware of a few things , you are going to waste vinyls and inks doing proofs , checks , leader waste , guttering waste etc so be careful of the Sq ft pricing model , apart from that , be aware some complex cuts can take ages to complete , so time should also be factored in.
Whatever you charge , make sure that it doesnt include artwork etc. IE its for the production of the job , design fees , artwork prep etc must be charged for as extras.
You want to amortise the cost of the machine over at worst , a year. So take the gbp 15k you paid for it and all its accesories and divide it by 200 (working days in a year) and thus you end up with the machine “costing” you an EXTRA 75 quid a day , you got to cover that and consumables before you even make a cent .
Raw printing for the trade (Ie print ready to be output without any other work apart from ripping etc) goes for about 25 quid and for the public , about 35 quid per sq meter at my place , but Im not in england and exchange rates and arbitrage play a part in translating pricing.