If you're reading this article, it will probably not surprise you the ABS reports more than half of Australia's adults aged between 18 and 24 still live at home. And while the portion notably decreases when we reach ages between 25 and 34, almost one in five have still not left the nest.

As a parent, there is no doubt you love your children and want to support them as best you can, but let's get real here for a moment -- your kids are grown, your cruise tickets are booked and you want to come back to a house where you can turn the spare room into a gym, sewing room or mini cinema!

Why are adult children staying at home longer?

This is of course a real estate site, so one of the major reasons reported for adult children staying at home, has to do with housing prices and rental costs -- either that they can't afford them, or they are saving for their own place in the future, by staying at home now.

And there's the catch; though many within the age group are working in some capacity, few are really contributing to the household. A 2018 Mozo survey finding very few pay full rent, just over 30% pay reduced rent and most contribute purely through household chores.

All up, the survey reports Aussie parents spend a combined weekly $235 million on their adult children who have remained at home.

Realistically, young adults have every reason to try to stick it out at home, paying no rent for as long as they can.

McCrindle compares average income in 1975 of $7,618 to average income in 2015 of $72,0000.

While the jump may seem remarkable, things get interesting when you note the average Sydney home cost $28,000 in 1975, around four times the annual salary, while now, the average home in Sydney costs over $850,000, which is more than 11 times the annual salary.

Despite the figures and the very fair arguments, the fact of the matter is (as proven by parents who have taken their grown children to court to remove them from their homes), there comes a time when the kids need to fly the coup, and you need to take back ownership of the TV remote and the bathroom!

How can you help your adult children find their way... out your door?

Now, let's start with a simple disclaimer here -- we are not necessarily advocating for parents to send their grown kids packing, but every family is different, every parent is different, and for you, perhaps it's just time!

Here are some simple tips to help your kids leave home successfully -- on the right path and headed for security, rather than financial stress and burden:

1. Help them help themselves with first home buyer grants and initiatives

While real estate is out of reach for many young people, it doesn't have to be -- often they are just not employing the most effective strategies. While your child may want to buy a property just around the corner from mum or dad and stay close by, or they might envisage a bachelor pad in the centre of the city, they need to be realistic. Likely you had to wait and work for your dream and they will need to do the same.

Start by sending your adult children on a mission to explore the various first home buyer grants in each state and territory. Most have restrictions relating to the level of establishment of the home (if it is new or not) or to its price -- this will help them set more reasonable expectations. Knowing they can get some government help may also be a little bit of motivation!

Next, introduce them to the federal first home buyer initiative, an opportunity they can take advantage of to draw on their super to help get their first deposit together.

Finally, talk to them about rent-vesting and compromise. You don't always get exactly what you want the first time. If you want to buy, think about doing it somewhere cheaper, even if you don't want to live in the location, so you can get a foot in the door... Then, rent the place you want to in a location closer to your choosing.

This is rent-vesting and it's a great way to start building a property portfolio.

2. Teach them about saving

While Dollarmites might have been all the go when older Gen Ys were kids, a lot of today's mid-20-year olds weren't exposed to this idea of saving.

Have a chat to the bank and get some pamphlets on savings accounts, their conditions and how your kids can work smarter not harder by selecting account types that earn them greater interest.

If your adult children already have a tidy little sum of savings, look at ways to increase it a little faster, like term deposits. This gives them some more time at home to save a little extra while their deposit matures, and it gives you a timeframe to work towards for gently nudging them out.

3. Make them pay rent

While real estate is expensive, the results of the Mozo survey and the fact many adult children don't pay any rent at all, is not just surprising, it's shocking.

Though you may be helping them to save, are they really learning the value of money if they are able to use what they earn to spend on whatever they choose, rather than meeting financial responsibilities that will be a part of their everyday life (and are part of most adult's lives) outside of the family home?

Making your adult children pay some rent may sound counter-intuitive, but it teaches them some valuable life lessons and prepares them for the real world!

4. Save their rent for them

While your kids may be saving, they also may not be very good at it. If you are making them pay rent (or you're taking the advice of tip three and you're just about to start to charge rent), consider saving their rent for them in a higher interest-earning savings account.

When they get close to their financial goal and closer to moving out, you can reward them with the extra money you have helped them save.

These days, because real estate can be expensive, some young people don't really consider the difference between renting and owning, but if nothing else, owning and paying off a mortgage is a forced form of saving. This last tip is similar -- they are saving and paying off the next part of their lives without even knowing it.