However, the child's earnings *might* indirectly affect the family's overall income, and if that income rises above the threshold for receiving FTC, the amount received could be reduced or the family might no longer qualify. The impact depends on the amount the teenager earns.
The crucial point is that the teenager's income is not considered a separate element for FTC calculation. It's only relevant insofar as it contributes to the household's total income. To be certain, the parents or guardians should check their eligibility with HMRC using their online services or by contacting them directly.