How to Keep Track of Receipts and Costs for Every Trade Job

A reliable job-cost record needs three things: evidence of the purchase, the correct financial details and a clear decision about which job the cost belongs to. If any one of those is missing, it becomes harder to trust the final cost of the work.

The simplest rule is that a purchase is not fully recorded until the receipt has been captured and the cost has been assigned either to a specific job or to general business overheads. A paper receipt sitting in the van may prove that something was bought, but it does not explain which project used it.

This matters when materials are bought for several customers in the same week. By the time the paperwork is sorted, a £180 merchant receipt can look familiar without anyone being certain whether it belonged to the bathroom, the extension or the emergency repair completed between them.

Why missing receipts cause more than a bookkeeping problem

Losing a receipt can create an accounting evidence problem, but the commercial damage starts earlier. If the purchase is missing from the job, the job appears cheaper than it really was.

That can lead to several poor decisions:

• believing a type of work is more profitable than it is;
• reusing a price that did not actually cover the materials required;
• underestimating the cash needed for a similar future job;
• putting direct job costs into general overheads because their destination is unknown;
• struggling to explain purchases to a bookkeeper or accountant; and
• missing supporting evidence for VAT or other accounting records.

A bank statement does not completely solve the problem. It may show that £243.60 was paid to a builders’ merchant, but it will not normally show which customer received the materials, what was bought or whether different VAT rates applied.

Decide whether each purchase is a job cost or an overhead

Before assigning a receipt, decide whether the spending happened because of one particular job.

A direct job cost can be linked reasonably to a specific project. An overhead supports the wider business rather than one customer’s work.

Some purchases require a consistent business policy. A box of fixings used across ten jobs may be too small to divide meaningfully. A large order of specialist fixings for one contract should normally be treated differently. The aim is not false precision; it is a repeatable approach that produces useful figures.

If a customer buys materials directly, do not record the customer’s payment as though it were your business expense. If your business pays and later recovers the amount through an invoice, the original purchase should not disappear from the commercial cost of the job merely because the customer reimburses it. Ask your accountant how the accounting and VAT treatment applies to your circumstances.

Record enough information to identify the cost later

A photograph of a receipt is useful evidence, but it is not a complete expense record by itself. The record should normally contain enough information for you, your team or your accountant to understand the transaction without relying on memory.

Useful expense details

• Supplier: the merchant, hire company, subcontractor or other business paid.
• Date: the transaction or invoice date shown on the evidence.
• Description: what was bought and why, written in practical terms.
• Category: materials, plant hire, waste, subcontractor cost or another suitable category.
• Net amount: the value before VAT where applicable.
• VAT rate and amount: based on the supplier evidence rather than an assumption.
• Total: the amount actually charged.
• Payment method: business card, bank transfer, cash or another method.
• Job or project: the customer work that incurred the cost, where relevant.
• Supporting evidence: a legible receipt, invoice or other appropriate document.

A description such as materials is rarely enough. A description such as copper pipe and fittings for Green Street boiler relocation is much more useful when reviewing the job three months later.

Use a capture routine that starts when the purchase is made

The longer the gap between buying something and recording it, the more likely the job connection is to be lost. A practical process can be completed in five stages.

1. Identify the job at the counter. Put the project name or reference on the supplier order where possible. If several jobs are involved, ask for separate transactions or receipts when practical.
2. Capture the evidence immediately. Photograph or upload the entire receipt while it is readable. Check that the supplier, date, line items, VAT details and total are visible.
3. Enter the numbers from the evidence. Do not rely solely on the amount appearing in the bank feed.
4. Choose the destination. Assign the purchase to the correct project or deliberately leave it as a genuine business overhead.
5. Reconcile the payment later. Match the bank transaction to the expense rather than creating a duplicate record.

Cash purchases need particular attention because there may be no clear bank transaction to remind you later. The safest point to record a cash receipt is before it goes into a pocket, cup holder or toolbox.

How one missing receipt changes a job result

Consider a landscaping project with a final selling value of £5,800 excluding VAT. For simplicity, this example looks only at recorded direct costs and does not include general business overheads.

Based on those figures, the job appears to have produced £2,300 before overheads:

£5,800 − £3,500 = £2,300

The apparent job margin is:

£2,300 ÷ £5,800 × 100 = 39.7%

However, a £286 net merchant receipt for edging and drainage materials was left in the van and never assigned to the project. The corrected direct cost is £3,786, leaving £2,014 before overheads.

£5,800 − £3,786 = £2,014

The corrected margin is approximately 34.7%. One missing receipt reduced the result by five percentage points. If that faulty figure is then used to price the next landscaping job, the pricing error can repeat.

Record VAT from the evidence, not from the bank amount

For a VAT-registered business, the total amount paid is not enough to establish the net cost and input VAT. A purchase with a net value of £120 and VAT of £24 produces a £144 bank transaction, but those three figures serve different purposes.

Do not automatically assume every purchase uses the standard VAT rate. Some receipts contain mixed treatment, and a card-terminal slip may not contain the information required from a VAT invoice. Whether VAT can be recovered depends on the evidence and the relevant rules.

If the business is not VAT registered, the total paid will normally be more relevant to commercial job costing because there is no input VAT recovery. In either case, record the supplier figures accurately and confirm uncertain treatment with your accountant.

Be careful when one receipt covers more than one job

A mixed receipt creates an allocation problem even when the paper is safely stored. The best solution is prevention: ask the supplier to process separate baskets or invoices for separate projects.

Where that is not possible, use the line items to divide the purchase according to the materials used on each job. Retain the original evidence and follow a recording method that leaves a clear trail back to the full supplier total. Avoid dividing costs using rough percentages unless there is a sensible basis for doing so.

Shared consumables also need a policy. You might treat low-value general consumables as overheads while assigning substantial job-specific purchases directly. Apply the same logic consistently rather than moving costs to whichever job currently looks most profitable.

Do not guess when an old receipt has lost its job connection

If you find an unidentified receipt, check the surrounding evidence before allocating it:

• the date and time of the purchase;
• the work diary and scheduled site visits;
• supplier order references;
• project photographs and shopping lists;
• messages between team members;
• the vehicle or employee that made the purchase; and
• whether the supplier can provide a clearer duplicate invoice.

If the destination still cannot be established, do not distort a job by guessing. Keep the business expense and evidence in the appropriate review or overhead process, then ask whoever made the purchase while there is still a chance of identifying it. The whole-business spending may remain recorded, but the profitability of the individual job will still be incomplete.

Run a short weekly cost check

Recording costs at the point of purchase is the main defence. A weekly review catches what gets through.

Check for:

• bank spending with no matching expense record;
• expenses with no receipt or supporting document;
• unallocated merchant, plant, waste or subcontractor costs that may belong to a job;
• cash purchases reported by employees or subcontractors;
• duplicate expenses created from both a receipt and a bank transaction;
• returns, refunds or supplier credit notes that change the original cost; and
• active jobs nearing completion with surprisingly little recorded spending.

This review does not need to become another evening of paperwork. Ten or fifteen minutes while the week is still fresh is usually more useful than trying to reconstruct an entire month from a box of receipts.

How Tools2Done keeps the cost and evidence together

Tools2Done allows a trade business to record the supplier, category, description, date, net amount, VAT, total and payment details for an expense. A receipt or supporting document can be uploaded, including an image pasted from the clipboard.

The expense can then be allocated to the relevant project. Project expenses feed into that job’s spending and profitability information, while costs without a project remain separate as business overheads.

Where a supported Open Banking connection is available and configured, bank spending can be matched to an existing expense or used to create a new expense during reconciliation. The receipt still matters because the bank transaction alone may not explain what was bought or which job used it.

Tools2Done does not remove the need to record the purchase or choose the correct project. It gives that decision a consistent place to live, alongside the evidence and the wider job record.

A practical next step

For the next seven working days, record every merchant purchase before leaving the car park or immediately after arriving on site. Capture the evidence, enter the amount and choose the job or overhead category while the reason for the purchase is still clear.

At the end of the week, compare the records with the business bank activity and review anything left unallocated. If this exposes regular gaps, move from loose receipt storage to a dedicated receipt and expense tracking process for trades. Better job figures begin with knowing where every real cost belongs.