I usually pay via a bottle of quality Whiskey every year, however have noticed that more and more shooters are gaining access to the same permissions under the guise of "badger control" and not paying or gifting anything, these people basically turn it around to imply that they are doing the farmers a favour.... which yes is technically correct.
One farmer called me yesterday about someone who's essentially given themselves permission, and torn up a hillside with his 4x4, so that's another gate now chained up and padlocked, surprised the farmer wasn't looking to report this as armed trespass.
But no, I wouldn't pay cash, but do offer a gift as a token of my appreciation, and its a good way to keep in contact.