Getting married, having children and buying a house or having a mortgage are apparently all key signs of becoming a 'grown up' according to a new survey of 2000 adults.
A fully-fledged adult must also know how to bleed a radiator, cook a meal from scratch, have a weekly budget and do the big shop once a week, the survey found.
Speaking for Skipton Building Society, who conducted the research, Tracy Fletcher said: 'The top 50 list makes for an interesting read. Many of the indicators are things which people need to have mastered - such as looking after the house and garden, being able to cook and taking responsibility when it comes to personal finances.
'But other factors are the key milestones in life - such as buying a house, getting married and having children - things which are happening at a later age due to economic circumstances, job security and so on. Owning a house topped the poll as two thirds of Brits felt this was the most significant factor when it comes to ageing and accepting responsibility, and yet it is now harder than ever to set foot on the property ladder.'
The research also showed that most people don't feel like an adult until the age of 26. This is reflected in the change of lifestyle undertaken as an adult; a 'grown up' will wear a coat on a night out, wear sensible shoes and go to bed before 11pm!
The modern adult finds a messy house annoying, does the ironing, files away post and takes their make-up off and! Other factors to appear in the top 50 list include actually liking walking round garden centres, buying a Sunday paper, having people round for dinner and listening to Radio 2
Tracy continues: 'These findings are a stark reflection of contemporary Britain, and the impact the recession is having on our most basic expectations. The inability to complete rites of passage as basic as standing on their own feet financially, and owning their own home, is effectively infantilising people and leaving us with a generation of who remain teenagers into their late 20s.
'However, there are some encouraging signals in our research, including the increased emphasis on financial awareness and capability, as people recognise that things like completing a Will and saving are vital stepping stones to a more prosperous and independent future. Although many people currently feel challenged in achieving these goals, the fact that such aspirations are front of mind should mean that - as the recovery hopefully gathers momentum - today's 'teenagers' now will eventually mature into more financially savvy adults than their predecessors, which can only make them better off in the long term.
'TOP 50 SIGNS YOU'RE A GROWN UP'
1. Having a mortgage 2. Mum and dad no longer make your financial decisions 3. Paying into a pension 4. Conducting a weekly food shop 5. Written a Will 6. Having children 7. Budgeting every month 8. Being able to cook an evening meal from scratch 9. Getting married 10. Having life insurance 11. Recycling 12. Having a savings account 13. Knowing what terms like 'ISA' and 'tracker' mean 14. Watching the news 15. Owning a lawn mower 16. Doing your own washing 17. Taking trips to the local tip 18. Planting flowers 19. Being able to bleed a radiator 20. Having a joint bank account 21. Having a view on politics 22. Keeping track of interest rates 23. Finding a messy house annoying 24. Being able to change a light bulb 25. Owning a vacuum cleaner 26. Holding dinner parties 27. Listening to Radio 2 28. Enjoying gardening 29. Spending weekend just 'pottering' 30. Mum starts asking you for advice 31. Carrying spare shopping bags just in case 32. Like going round garden centres 33. Wearing coats on a night out 34. Going to bed before 11pm 35. Making sure mum and dad are phoned at least once a week 36. Classing work as a career rather than a job 37. Repairing torn clothing rather than throwing it away 38. You iron 39. You wash up immediately after eating 40. Enjoy cooking 41. Buying a Sunday paper 42. Always going out with a sensible pair of shoes 43. You like receiving gift vouchers 44. Work keeps you awake at night 45. Filing post 46. Having a 'best' crockery set 47. Being able to change a car tyre 48. Being sensible enough to remove make up off before bedtime 49. Being able to follow a receipt 50. Owning 'best towels' as well as 'everyday towels'