Common mistakes include overlooking savings and other capital, misunderstanding how a partner’s income affects a joint claim, or assuming that working automatically rules out Universal Credit. People can also miss the effect of self-employed income, housing arrangements, immigration conditions, or changes such as moving home or having a child. Give complete and accurate information and report changes promptly through your online account, as incorrect details could affect your award or create an overpayment. Check the latest eligibility guidance on GOV.UK, or seek independent advice if your circumstances are complicated.