9th August 2026
Marriage, relationships and family have traditionally been the main reasons people share a home. But as housing, energy and everyday living costs continue to rise, could a very different form of cohabitation become increasingly common — people living together simply because it makes financial sense?
It might sound like an unusual idea.
Two friends sharing a house.
A recently divorced person taking in a friend.
Two pensioners deciding that sharing a larger home makes more sense than maintaining two separate properties.
Young workers pooling their incomes to rent a decent house rather than struggling to afford a small flat.
Or three unrelated adults deciding that they can live comfortably together and save thousands of pounds a year.
None of these arrangements necessarily involves romance.
They are simply financial partnerships between people who get on with each other.
Perhaps the time has come to give the idea a name:
Financial cohabiting.
The mathematics are compelling
The biggest attraction is simple.
Many household costs don't double when another person moves in.
A house may have:
one mortgage or rent payment;
one council tax bill;
one broadband connection;
one television licence;
one boiler;
one washing machine;
one fridge and freezer;
one set of basic household equipment.
Energy consumption will rise when another person moves in, and food costs obviously increase.
But many of the biggest costs are shared.
That means two people living together can potentially spend considerably less per person than two people maintaining separate homes.
For three people, the potential savings can be even greater.
Housing is the obvious driver
Housing affordability could become the biggest force behind this change.
For a single person, paying the entire rent or mortgage on a property can be extremely expensive.
A couple has two incomes contributing to one household.
But a single person doesn't necessarily need to remain alone simply because they are single.
If two friends can share a three-bedroom house, they may each get more space for less money than if they rented separate one-bedroom properties.
That could become particularly attractive in areas where rents have risen sharply.
And it changes the calculation completely.
Instead of:
"I can't afford a decent home."
the question becomes:
"Who could I comfortably share one with?"
It isn't just young people
The stereotype would probably be young professionals sharing a house.
But the idea could potentially appeal to much older people too.
Consider a widow or widower living alone in a three- or four-bedroom house.
The mortgage may be paid off.
But there are still:
council tax;
heating;
electricity;
insurance;
repairs;
maintenance;
broadband;
gardening;
household equipment.
Maintaining the property can become surprisingly expensive for one person.
Another older person in a similar situation could face exactly the same costs.
Why should two people living alone each maintain a complete household?
If they were compatible friends, they might potentially share those costs.
There could also be a social benefit.
Living alone can be expensive — but it can also be lonely.
Friendship rather than romance
This is where financial cohabiting could challenge traditional ideas about households.
We tend to think of people sharing homes in only a few categories:
couples, families or housemates.
But there is another possibility.
Friends.
Two people who have known each other for years may already understand each other's habits.
They may enjoy each other's company but have no desire for a romantic relationship.
They could potentially share a home in much the same way that married couples share household responsibilities — simply without the romantic element.
That may sound unconventional today.
But economic circumstances can change social conventions surprisingly quickly.
The biggest obstacle may be privacy
Of course, sharing a home isn't simply about dividing the bills.
People need privacy.
They need somewhere to retreat.
They need different lifestyles to be compatible.
One person might like television late at night.
Another might want an early bedtime.
One might be exceptionally tidy.
Another might be considerably more relaxed about housework.
One might enjoy having friends around.
The other might want a quiet home.
These are exactly the problems that can make sharing a house difficult.
Financial cohabiting would therefore require something more important than simply wanting to save money.
The people involved would actually have to get on.
Perhaps the spare bedroom becomes an economic asset
There is another interesting consequence.
Britain has millions of homes containing spare bedrooms.
Some are occupied by older people whose children have moved away.
Others belong to single people who have inherited or retained larger family homes.
The conventional assumption is that a spare bedroom is simply part of the home.
But in a high-cost economy it could increasingly be regarded as an economic asset.
It could provide:
rental income;
shared household costs;
companionship;
help with household tasks;
security when someone is away.
Of course, renting a room to a stranger is very different from sharing your home with a friend.
But it demonstrates the underlying economic principle.
Unused housing capacity has value.
The pensioner opportunity
This could become particularly interesting as Britain's population ages.
There are many older people living alone in homes that were originally designed for families.
At the same time, there are younger people struggling with housing costs.
That creates a potential mismatch.
One generation may have:
space but limited income.
Another may have:
income but limited housing.
Financial cohabiting could potentially bring those two resources together.
It wouldn't necessarily mean an older person taking in a traditional lodger.
It could mean two people agreeing to share a home and its costs on a more equal basis.
There could even be arrangements where the younger person provides practical help with shopping, gardening or technology while the older person provides accommodation.
That begins to look less like traditional renting and more like a household partnership.
But there are risks
There would be plenty of potential problems.
Money can damage friendships.
What happens if one person stops paying?
Who pays for repairs?
What happens when the roof needs replacing?
Who owns the furniture?
What happens if one person wants to leave?
What happens if one person meets a new partner?
What happens when one person dies?
And what happens if the property is owned by only one of the occupants?
These questions would need to be settled before people move in together.
A simple written agreement could become just as important as the friendship itself.
Benefits could go in both directions
Done properly, however, the arrangement could offer more than financial savings.
For young people:
lower housing costs and greater financial independence.
For older people:
companionship and shared household expenses.
For single people:
a way of obtaining a better home without taking on the entire cost themselves.
For people working remotely:
company during the working day.
For rural communities:
a way of keeping larger properties occupied rather than allowing them to become increasingly difficult for one person to maintain.
And for society generally:
more efficient use of existing housing.
Could attitudes change?
Social attitudes have changed dramatically before.
Living together before marriage was once controversial.
Single-parent households became increasingly accepted.
Flat-sharing became normal for young adults.
Working from home has changed ideas about what a home can be.
And multigenerational households, while still less common than in some other countries, are increasingly discussed as a response to housing costs.
The next change could be simpler:
sharing with somebody you aren't romantically involved with because it makes economic sense.
The financial argument may gradually become more powerful than the social awkwardness.
The danger of making necessity look like choice
There is, however, an important warning.
We should not romanticise this.
If people start sharing homes because they genuinely want to, that is one thing.
If they are forced into shared living because they cannot afford to live independently, that is something different.
A society in which a pensioner cannot afford to heat their home unless they take in a lodger isn't necessarily demonstrating successful adaptation.
It may instead be demonstrating that housing and living costs have become too high.
There is a danger that policymakers could say:
"People can simply share."
That shouldn't become an excuse for ignoring the underlying affordability problem.
The financial calculation
Nevertheless, the potential savings are difficult to ignore.
Suppose two people each spend £900 a month maintaining separate households.
Together they might not need to spend £1,800.
Even after allowing for additional food, energy and other costs, the combined household could potentially save several hundred pounds every month.
Over a year, that could mean thousands of pounds.
For somebody on a modest income, that is not a trivial saving.
It could mean:
less borrowing;
more savings;
lower financial stress;
greater ability to heat the home;
money for holidays;
or simply a little more security at the end of each month.
Could financial cohabiting become normal?
Perhaps.
The idea may initially sound strange because we are accustomed to thinking about households in terms of relationships.
But economics has a powerful way of changing social behaviour.
When two people discover that sharing a home can save them £5,000 or £10,000 a year, the calculation becomes difficult to ignore.
And if they already like and trust each other, the idea becomes considerably more attractive.
The future may therefore contain more households based not on marriage or romance but on something much more practical:
friendship, compatibility and shared economics.
Financial cohabiting may already be here
The interesting point is that we may not actually need a government programme to create it.
It can happen naturally.
Two friends realise they are both paying too much.
A brother and sister decide to move in together.
Two widowed friends share a property.
A group of single workers rent a larger house.
An older homeowner offers a room to someone who needs accommodation.
None of these arrangements needs a new name.
But collectively they represent a possible change in the way people think about housing.
The home is no longer simply somewhere we live.
It is also one of the largest financial assets and expenses in our lives.
And when that cost becomes too high, people may increasingly decide that sharing it makes sense.
The final question
Perhaps the real question isn't whether financial cohabiting will happen.
It is how far it will go.
Will people increasingly choose friends over strangers as housemates?
Will older homeowners share their homes rather than sell them?
Will younger workers stay in shared homes for longer?
Will two single pensioners decide that sharing makes more sense than maintaining two separate households?
And could we eventually look back and wonder why we ever assumed that the only people who should share a home were couples and families?
As the cost of living continues to squeeze household budgets, one thing is becoming clear:
Being able to afford to live alone is increasingly becoming a financial luxury.
Financial cohabiting may not be for everyone.
But for some people, it could offer something increasingly valuable:
a decent home, lower costs and someone else to share the bills — and perhaps the company too.