I'm not sure. Passive acceptance might be too presumptuous. You may end up performing services that the customer will later say 'I never asked for that this year'. You'll say 'see, it's right here in the contract'. Some will say 'Oh, Okay.' Others will say 'Good luck collecting from me.' I would think the latter will be especially true for any years that you raise prices. <p>It'd sort of be like those record club deals. Unless you send back notice saying you don't want an item, you've bought it.<p>Your way sounds much more efficient, but I'd be afraid of what the efficiency would cost you later.