Side Hustles Are Funding a Generation of First Homes

The path to a first front door increasingly runs through resale apps, delivery routes and evening tutoring sessions. Fresh research from mortgage broker Mojo Mortgages finds that 64% of first-time buyers are using Side Hustles to build their deposit, with selling secondhand goods, freelance work, delivery driving and online tutoring among the most common ways savers top up their funds, according to IFA Magazine. The findings point to a generation quietly rewriting how homeownership gets financed.

For most of these buyers, the extra income is not a nice-to-have but the thing making the purchase possible. More than half said their side hustle reduced deposit-saving time by two to three years, and a majority reported cutting years off the timeline to buying a home entirely. The trend is strongest among the youngest buyers, with 72% of 18-to-24-year-olds running Side Hustles specifically to fund a deposit or long-term savings, as reported by The Intermediary.

Why Side Hustles are buying the deposits

Wages alone have struggled to keep pace with the twin squeeze of rising rents and rising house prices, which is why Side Hustles have moved from weekend curiosity to financial strategy. Instead of waiting years longer, buyers are converting spare hours into deposit money: listing clothes and gadgets on resale platforms, taking on freelance design or writing jobs, ferrying takeaway orders across town, or teaching students over video calls. Side Hustles have become, for many, a second salary with a single purpose, getting the keys sooner.

The broker's survey puts the scale of the shift in perspective. Where previous generations saved almost exclusively from take-home pay, today's buyers treat extra income streams as a normal part of getting on the ladder. The numbers suggest this is no longer a niche tactic but the default playbook, and mortgage advisers are now routinely asked how such earnings can be factored into an application. Explore more coverage on the side hustles beat to see how young earners are reshaping work and money.

The missed deadline and what it costs Side Hustles

Here is the catch the survey's tax warning makes clear. Anyone who earned more than a thousand pounds in gross trading or self-employment income during the 2025/26 tax year had to register for Self Assessment by 5 October 2026, and that deadline has now passed. Buyers who crossed the threshold but never registered now face automatic penalties and interest on any unpaid tax, according to tax guidance reported by Think Money.

The damage is not only financial. Mortgage lenders typically demand official proof of extra earnings, such as an SA302 form or a Tax Year Overview, before side hustle income can count toward a borrowing limit. Undeclared earnings simply do not exist in a lender's eyes, so buyers who skipped the paperwork can see their borrowing power shrink exactly when they need it most. Industry experts quoted in the coverage warn that thousands of side-hustling buyers now risk either penalties from HMRC or a mortgage application weakened by unverifiable income.

There is also a quiet irony for Gen Z earners: the same money funding their deposits is the money they needed to declare. Related reporting has tracked a growing earnings divide among UK side hustlers, which makes getting the paperwork right even more valuable for those banking on every extra pound.

What to do if you missed the deadline

The worst response is to wait and hope. Tax advisers consistently say the same thing: register late now rather than not at all, because penalties generally scale with the tax owed and paid late. Once registered, HMRC issues a Unique Taxpayer Reference, and the online return for the 2025/26 year is due by 31 January 2027, leaving months to get filings in order.

For buyers mid-application, timing matters. Declaring the income late still beats leaving it hidden, since a registered return can eventually produce the documentation lenders want. Keep clean records from today forward: monthly totals of gross income, receipts for expenses, and platform payouts. Buyers can choose between the tax-free trading allowance, which covers the first thousand pounds, or deducting actual expenses, whichever leaves the lower taxable amount.

The counterpoint: hustle income is still fragile

None of this guarantees the side hustle dream works for everyone. Extra income is by nature irregular, and some lenders discount variable earnings or want to see a longer track record before counting them. Buyers who stretched their budget assuming every gig pound would count toward their loan may find affordability calculations less generous than expected.

Still, the broader signal is hard to miss. Side Hustles have moved from supplementing spending money to financing the single biggest purchase of a young person's life. Those earnings now carry the same responsibilities as a salary, registration, declaration and records, and buyers who treat them that way keep both the taxman and their lender onside.