Many people mistakenly believe that all tax codes are the same because the number (1251) is identical. They are fundamentally different in terms of the tax you pay.
If the Senedd changes the WRIT in future budgets, the C prefix will remain, but the calculation behind your payslip will change. You do not need a new code—the C simply instructs your employer to apply whatever the current Welsh rate is . c1251l tax code
