Au pair vs nanny: the honest comparison

The fundamental difference

A nanny is childcare staff. You employ them, pay them a salary, withhold tax, and can set professional expectations — qualifications, experience, notice periods, performance reviews.

An au pair is a young person on a cultural exchange who lives in your home and helps with the children for capped hours in return for room, board and pocket money. Legally, they are closer to an exchange student than an employee — and the visa rules treat them that way.

What each one costs

A full-time nanny in the UK, US or Australia typically costs a full salary — often £2,000–£3,500 / $3,000–$5,000 a month before employer taxes. An au pair costs pocket money (see our pocket money guide for country rates) plus the cost of a room and food — usually a fraction of a nanny's salary, though in Australia, where minimum wage applies, the gap is smaller.

The trade-off is hours and flexibility. A nanny can cover 40–50 hours a week including early mornings and late evenings. An au pair's week is capped, evenings are limited, and they need time for their language course. If you need full-time cover for a baby, an au pair is usually the wrong tool.

What you can ask of them

The duty lists overlap but the limits don't.

• Au pair: childcare and light child-related housework only — no deep cleaning, no cooking for the adults, capped hours
• Nanny: whatever the contract says — nursery duties, meal prep, school admin, sometimes housekeeping
• Au pair: needs a private room, meals, and time off for language study
• Nanny: can live in or live out, with normal employment terms

Which one is right for you

Choose a nanny if you need full-time or sole-charge cover for very young children, if you want a long-term professional, or if you don't have a spare room.

Choose an au pair if your children are school-age, your need is wrap-around care (mornings, after school, some evenings), you have a spare room, and the cultural exchange side genuinely appeals to your family. The families who love au pairing want the exchange as much as the childcare.

Many families do both across the years: a nanny while the children are small, then au pairs once school hours shape the week.