The definition of “cash voucher” for NICs purposes is the same as that for tax purposes (see EIM16110). That is, a voucher, stamp or similar document capable of being exchanged for a sum of money which is:
the cost of providing the voucher, stamp or similar document.
For the above purposes, it doesn't matter whether the
voucher, stamp or similar document is capable of being
exchanged:
Example
A voucher:
This is a cash voucher because the amount of cash for which it
can be exchanged - £90 - is greater than the cost of provision
- £80.
For details of the amount of earnings included in a cash
voucher, see
NIM02498.