• Enquiry
• Quote
• Agree
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• Paid

Materials, and Who Buys Them

Materials are treated as a pass-through cost. They are a commercial decision with consequences for cash flow, margin, delay and liability, and the arrangement is usually settled by habit rather than by choice.

For a software-side reference alongside this discussion of pre-work decisions, contracts, and small-business administration, Monitask provides guidance on remote workforce management software.

The three arrangements

You supply. You buy, you mark up, you carry the cost until you are paid, and you are responsible when something is wrong.

They supply. No outlay, no margin, no control over quality or timing, and a completely different liability position.

They supply and you specify. You produce a list, they buy it, and the practical outcome sits between the two.

What each does to cash flow

Supplying materials means funding them.

On a job with a substantial material element and thirty-day terms, you are financing the customer for the period between paying your supplier and being paid yourself — and your supplier's terms are frequently shorter than the customer's.

A deposit is the direct remedy and is the main reason deposits exist in trades with material-heavy work.

Where the customer supplies, the cash problem disappears and so does the margin, which is a trade rather than a saving.

What each does to liability

This is the part most often misjudged.

Materials you supply are materials you are answerable for. A failed component you fitted is your problem first, and your recourse against the manufacturer or merchant is a separate matter you have to pursue.

Materials the customer supplies are theirs. If the tiles are the wrong batch, if the unit is faulty, if the paint is unsuitable for the surface — the responsibility for the choice sits with them.

But not the workmanship. Fitting something you knew was unsuitable does not transfer back to them, and "they supplied it" is not an answer if you fitted it anyway without saying anything.

Which produces the practical rule: where a customer supplies something you think is wrong, say so in writing before fitting it. One message, kept.

What each does to delay

Customer-supplied materials are the leading cause of jobs that stall.

Late deliveries, wrong quantities, items ordered from a photograph. None of these is your fault and all of them cost you time, and unless the arrangement says otherwise, that time is unpaid.

Say what happens. In the quote: work is scheduled on the basis that materials are on site by a stated date, and delays beyond that are rescheduled and may attract a charge.

That sentence is rarely enforced and frequently effective, because it makes the deadline somebody's responsibility rather than nobody's.

Marking up

Standard practice in most trades and worth being explicit about with yourself.

The markup pays for selection, collection, storage, carrying the cost, handling returns, and the liability above. It is not a hidden charge; it is payment for a service that has real costs.

Where a customer objects, the honest response is the choice: they can supply and take those tasks and risks back, or you can supply and the price includes them. Presented that way it is a decision rather than a dispute, and most customers choose the arrangement that involves them doing nothing.

What to write in the quote

Which arrangement applies, in one line.

What is included — the specific items, so that a substitution later is visible.

What happens if prices move, on quotes valid for longer than a few weeks. Material prices have been volatile enough in recent years that a validity period is not a formality.

And what happens to unused materials. They belong to whoever paid for them, and saying so prevents the conversation on the last day.

Deliveries and storage

Somebody has to receive them and somebody has to keep them dry.

On domestic work this is usually the customer, and it should be said rather than assumed. A delivery that arrives to an empty house goes back, and the redelivery is a delay nobody planned.

Storage on site is a risk allocation. Materials on a site are exposed to weather, theft and damage by other trades, and whose problem that is should be settled before the pallet arrives rather than after something goes missing.

Where you store materials at your own premises, that is a real cost and it belongs in the price.

Returns and the leftover

Merchants restock at a charge or not at all, and special orders are frequently non-returnable.

Which means an over-order on customer-supplied materials is their loss and an over-order on yours is yours, and that difference is a reason to quantify carefully rather than generously.

On the leftover, say who it belongs to in the quote. Materials paid for by the customer are the customer's, including the offcuts, and a supplier who takes them away without asking has created a small grievance out of nothing.

Invoicing materials separately

On material-heavy jobs, invoicing materials and labour as separate lines changes what a customer can query.

A single figure invites a challenge to the whole. Two lines let a customer accept the materials — which they can verify against a merchant's prices — and query only the labour, which is a narrower and shorter conversation.

It also makes staged payment natural. Materials invoiced on delivery and labour on completion is a structure customers understand, and it removes the position where you have funded a large purchase and are waiting on one payment at the end.

Where you would rather not show the markup, quote a supply-and-fit price per item instead of splitting the two. That is a legitimate structure and is not the same as hiding it — the customer sees a price for a finished thing, which is what they are buying.

The short version

• Three arrangements: you supply, they supply, or they supply to your specification — usually settled by habit rather than choice
• Supplying means financing the customer between your supplier's terms and theirs, which is what deposits are for
• Materials you supply are materials you answer for; customer-supplied materials are theirs, but the workmanship never transfers
• Where a customer supplies something unsuitable, say so in writing before fitting it
• Customer-supplied materials are the leading cause of stalled jobs, so state in the quote what happens when they are late
• Markup pays for selection, carrying cost, returns and liability, and the honest response to an objection is to offer the choice

For broader background on pre-work decisions, contracts, and small-business administration, see GOV.UK.