This document discusses user fees and cost-sharing in OECD countries. It finds that most countries require patients to share costs for outpatient primary care through copayments or deductibles. Inpatient care is more often free or subject to small daily copayments. Pharmaceutical costs are usually shared through coinsurance rates or prescription fees. Exemptions from cost-sharing are often provided for vulnerable groups like children, seniors, disabled, and low-income individuals. While fees can potentially increase revenues and reduce moral hazard, they may also reduce access to essential care and disproportionately burden the ill and poor. Alternatives to fees include benefit refinement, reference pricing, and promotion of self-care.