Illustrative scenario, not a real client case or a mortgage offer. Ben and Lucy Vale are a fictional couple. Ben serves in the regular Armed Forces and expects an overseas posting. Lucy would prefer to stay near her work and their daughter's school. They are considering a house before he leaves, but their deposit spreadsheet has moved much faster than their conversation about who will live there.

Agree what the house is actually for
In this version of the story, Lucy and their daughter would occupy the house throughout Ben's posting. Ben would return when his commitments allowed. That is the plan to explain when asking about a mortgage. It is more useful than saying only that a member of the Armed Forces wants to buy while overseas.
Before viewing more properties, they could write down their intended moving date, Ben's expected departure and the accommodation each person would use. What would change if Lucy later decided to join him? Would the house stand empty, or would they want tenants? Those are questions to raise now, not assumptions to leave until completion.
Keep deposit support separate from mortgage permission
Ben wonders whether Forces Help to Buy could supplement their savings. The MOD describes it as an interest-free advance towards a purchase for eligible regular personnel, subject to its conditions. It is borrowing, not a gift. The official scheme overview is a starting point, not confirmation that Ben qualifies.
They could ask service staff to check eligibility and explain repayments, applicable charges and the effect on accommodation entitlement. Separately, an adviser could check whether a proposed mortgage lender would accept the arrangement. Their planning sheet should distinguish money already saved from any scheme amount that has not been confirmed. Neither should be mistaken for a mortgage offer.
Budget for an ordinary month apart
The couple could sketch a month with Lucy in the house and Ben away. Alongside a possible mortgage payment, what would they allow for household bills, childcare, travel home and any continuing service accommodation charges? Would Lucy's working hours remain the same? A reassuring combined salary figure would not answer those practical questions.
For the income discussion, Ben could identify which payslip entries reflect basic pay and which relate to his current duties. They should ask what would continue after the move. Lucy could gather her own employment evidence. Rather than choose their best recent month, they could test whether the plan still feels manageable without payments expected to stop.
Build in a checkpoint if the plan changes
Imagine Lucy receives an opportunity to work abroad after the couple have started enquiries. Renting out the house might sound like a convenient fallback, but they should first ask the mortgage lender about the proposed change. If Forces Help to Buy were involved, the scheme would need separate attention too.
Current JSP 464 rules include occupancy requirements and an approval process for letting a Forces Help to Buy property. Approved letting also attracts scheme interest charges. Ben and Lucy should therefore seek confirmation for their actual circumstances before treating rent as the answer to a changed posting plan.
Choose the next enquiry, not an imagined outcome
If the family would remain in the UK, a possible next step would be a criteria check for that occupancy arrangement, supported by income details and an accurate address history. If everybody might move, pausing the purchase could be worth comparing with a different, properly assessed property plan. Nothing here establishes which option would be suitable or available.
Ben could begin with: 'My family plans to live in the house while I am posted away. What evidence and permissions would you need?' Read the Armed Forces mortgage service page for the wider discussion. The couple, their circumstances and these possible routes are fictional, with no lender decision or personal recommendation implied.
Sources and useful reading
General information, not a personalised recommendation. Lender criteria and scheme rules can change. No approval, rate or borrowing amount is promised in this example.
Talk through your own circumstances
Our armed forces mortgages page explains the advice available and how to get in touch.
Armed Forces Mortgages