PAYE10040 - Coding: coding allowances and reliefs: double taxation relief
Customers, who find they are paying tax on overseas income both in the UK and in the country where the income arises, will normally be able to obtain relief from double taxation.
The UK has double taxation agreements with a number of other countries, which aim to prevent, or give relief for, double taxation. This means that the income will be taxed only in one country, or if taxed in both, that one country will allow credit for the tax paid in the other. Further advice is in the International Manual (INTM) at INTM165000 onwards and in the Employment Income Manual at EIM40601.
Generally these cases will be Self Assessment and relief will be given in the SA return at the end of the year. An individual may ask for relief to be given in their coding, you should enter the amount allowable in income, allowances, benefits and deductions (IABD) using the description Double Taxation Relief (PAYE130025).
Use the facts you have to estimate the relief due and calculate the coding allowance to be entered.
For example an individual is due relief of £150, calculate the coding allowance at the highest rate of liability.
Individual liable at basic rate - £150 x 100/20 = 750
Individual liable at first higher rate - £150 x 100/40 = 375
Individual liable at the additional rate - £150 x 100/50 = 300
The system carries forward the allowance from year to year.

