Asking for money before you start
A bathroom suite, a boiler, a run of kitchen units — somebody has to fund those before anyone turns a screw, and for most small trades that somebody is you. Asking for materials up front is entirely normal and it is the conversation trades find hardest, usually because it is had badly and late.
Why it feels awkward and should not
Buying several thousand pounds of materials for somebody you met once is not a deposit in any meaningful sense — it is an unsecured loan to a stranger, made by a business that usually cannot afford to make it. Customers understand this immediately when it is put in those terms, and almost nobody objects to paying for their own bath. The awkwardness comes from asking apologetically, as though it were a favour.
Ask at the right moment
A materials payment mentioned in the quote is a term. Mentioned on the morning of day one, it is a demand.
"The units and the boiler come to eighteen hundred" is concrete. "Fifty per cent up front" invites a negotiation about the number.
Naming what the money buys makes it obviously fair and makes it obviously not profit taken early.
Offering to show what was bought removes the last objection before it is raised.
What refusing tells you
Most customers agree without much thought. A customer who will not fund their own materials — for a job they are asking you to start next week — is telling you something worth hearing about how the final invoice will go. It is not proof of anything, but it is the cheapest signal you will ever get, and it arrives before you have committed anything but a conversation.
Keep it separate from your labour
Materials money is not payment for work and should not be treated as income until the job runs. Trades that spend it before the work happens end up funding the next job with the one after that, which works until a customer cancels. Keeping it distinct is an accounting habit rather than a phone one, but the phone call is where the expectation gets set — "this covers the materials, labour is invoiced on completion" is one sentence and it prevents a whole category of dispute.
Frequently asked
Entirely. Buying several thousand pounds of materials for somebody you met once is an unsecured loan to a stranger, and customers understand that immediately when it is put plainly.
In the quote, not on the morning of day one. Mentioned at quoting it is a term; mentioned at the start it is a demand.
A figure, tied to named items. "The units and the boiler come to eighteen hundred" is concrete; "fifty per cent" invites a negotiation.
It is the cheapest signal you will get about how the final invoice will go, and it arrives before you have committed anything but a conversation.