Andrea applies for personal independence payment (PIP) due to her disability on .
She receives a letter dated 6 December 2017 awarding her PIP from .
If you are claiming child tax credit (CTC) only or CTC and working tax credit (WTC), this should happen automatically.
If you are claiming WTC only, you should attach a letter to your claim form asking for this backdating.
If you claim universal credit you cannot also make a claim for tax credits to cover a backdated period leading up to your universal credit claim. Andrea is single, aged 30 and works 25 hours a week.