Buying your first home together is an exciting milestone. But when two people have different salaries, savings and financial commitments, understanding how a joint mortgage works becomes particularly important.
Emma and Daniel had been together for six years. They’d spent the last three renting a small house while saving towards buying somewhere of their own. Every month, money went into their savings account. They’d sacrificed holidays, postponed buying a newer car and spent countless evenings browsing property websites.
Finally, they felt ready. They had saved £25,000 and were looking at properties priced around £250,000 but there was something they hadn’t really discussed. Emma earned £42,000 a year working in marketing. Daniel earned £26,000 working in hospitality. Emma had also contributed considerably more towards their deposit.
They were both comfortable with the arrangement, but when they started exploring mortgages, they realised they had several questions. Would the difference in their salaries affect how much they could borrow? Would Emma’s larger deposit contribution matter? What would happen if one of them couldn’t afford their share of the mortgage?
Buying Your First Home – A Joint Mortgage Isn’t Necessarily a 50/50 Arrangement
One of the biggest misconceptions about joint mortgages is that both applicants must earn similar amounts. In reality, many couples have different salaries. One partner may work full-time while the other works part-time.
Someone may be self-employed while their partner receives a regular salary. Others may have taken career breaks, changed industries or returned to work after having children. Mortgage lenders generally assess the applicants’ combined financial circumstances, including eligible income and household commitments. This means that a difference in earnings doesn’t automatically prevent a couple from obtaining a joint mortgage.
However, it also doesn’t mean the lender simply adds both salaries together and multiplies the total by a fixed figure. Affordability assessments can be more detailed than that.
How Much Could They Borrow?
Emma and Daniel have a combined annual income of £68,000. A simple income multiple might suggest a substantial borrowing figure.
However, the amount a lender may actually offer depends on its criteria and affordability assessment. Existing financial commitments can affect the calculation. For example, Daniel has a car finance agreement costing £280 per month. Emma has a credit card that she pays off regularly.
The lender may also consider household expenditure, dependants and other relevant commitments. Different lenders can reach different affordability outcomes using the same underlying information.
For Emma and Daniel, this means understanding their likely borrowing position before committing to a property purchase is particularly important.
An Agreement in Principle may help provide an initial indication, although it isn’t a guaranteed mortgage offer.
The Deposit Question Nobody Wants to Raise
Money can be an uncomfortable subject, even for couples who have been together for years. Emma had saved £17,000 towards their deposit. Daniel had contributed £8,000. Neither felt the arrangement was unfair.
Emma earned more and had been able to save more.
However when they began discussing property ownership, they realised they hadn’t considered what their different contributions might mean in the future.
- Would they own the property equally?
- Should their individual deposit contributions be protected?
- What would happen if they eventually sold the property or separated?
These are legal questions rather than mortgage questions alone.
A solicitor can explain the available ownership arrangements and whether a declaration of trust or another agreement may be appropriate. For couples who are not married, discussing these matters before completing a purchase can be especially valuable. The conversation may feel awkward, but establishing a shared understanding early can help avoid disagreements later.
Why Your Deposit Is Only Part of the Cost
With £25,000 saved, Emma and Daniel initially assumed they could use the entire amount as their deposit. On a £250,000 property, that would represent a 10% deposit. However, they also needed to consider the other costs involved in buying. Solicitor fees, surveys, mortgage-related charges, removals and any applicable property taxes could all affect their available budget.
They would also need money for furniture, household essentials and unexpected expenses.
Moving into a first home often brings costs that aren’t immediately obvious during property viewings. A boiler might need attention. An appliance could fail. The garden might require work. Using every available pound towards the deposit could leave them financially vulnerable immediately after moving.
A sensible buying budget therefore considers more than the purchase price.
What Happens If One Person Loses Their Income?
Emma and Daniel were focused on getting the keys. Understandably, they were excited about decorating, choosing furniture and finally having a home of their own, but a mortgage is a long-term commitment.
What happens if one person becomes seriously ill?
What if an accident prevents them from working for several months?
Could the remaining income support the mortgage and other household expenses?
With a joint mortgage, both borrowers are generally responsible for the mortgage debt. That responsibility doesn’t automatically reduce because one partner loses their income. This makes protection an important consideration.
Income protection may provide regular payments if an insured person cannot work because of illness or injury, subject to the policy terms. Life insurance and critical illness cover may also be relevant, depending on the couple’s circumstances and objectives.
The appropriate arrangements depend on existing benefits, savings, financial commitments and the level of cover required.
Choosing a Mortgage That Fits Their Lives
For Emma and Daniel, the mortgage decision wasn’t simply about finding the lowest available rate.
They wanted to understand how much their payments would be and whether those payments remained affordable alongside their other commitments. They also needed to consider their future plans.
Would they want children?
Was either partner likely to change jobs?
Did they expect their income to increase?
Were they planning to remain in the property for several years?
These questions can influence decisions about the mortgage term, initial deal period and product features. A fixed-rate mortgage might appeal to borrowers who value predictable payments. Others may prefer different arrangements depending on their circumstances and attitude towards payment changes.
There isn’t one mortgage structure that automatically suits every couple.
Why Getting Advice Early Can Make the Process Easier
Buying a first home involves a series of decisions that can feel overwhelming. Estate agents, solicitors, surveyors and lenders all have different roles. For buyers unfamiliar with the process, it’s easy to become focused on finding the right property before understanding the financial arrangements.
However, reviewing affordability and deposit requirements early can make the property search more realistic. It can also help couples identify potential issues before they make an offer. For Emma and Daniel, understanding their borrowing position would allow them to search with greater confidence.
They could focus on properties within a realistic budget while keeping enough money available for the wider costs of buying.
Starting Your First Home Journey With HFA
Buying your first home together should be an exciting experience. Differences in income, savings or financial commitments don’t necessarily need to become obstacles.
What matters is understanding how those differences affect your mortgage options and making decisions that suit both applicants. At HFA Mortgage & Protection, our advisers can help first-time buyers understand affordability, deposit requirements, mortgage products and the application process.
We can also discuss relevant protection options so you can consider the financial commitments that come with owning a home.
If you’re planning to buy your first property together, speak to HFA Mortgage & Protection before beginning your search.
Disclaimer: There may be a fee for mortgage advice. The precise amount will depend upon your circumstances but will range from £195 to £1,500.
Your home may be repossessed if you do not keep up repayments on your mortgage.
Should you fail to disclose or misrepresent a fact, then you risk the insurer only paying part of a claim, declining to pay all the claim possibly, declaring the policy invalid.

