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Why Do Our Engineers' Site Visit Mileage and Disbursements Never Make It Onto Client Invoices?

Engineering consultancy site visit mileage and disbursements go unrecharged to clients. We link expense claims to projects and drop them into invoices.

Updated 3 min readBy SpiderHunts Technologies

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Quick answer — TL;DR

Recoverable expenses get lost because engineers claim mileage, parking and printing through an expense system that is not linked to projects or to client invoices. We build a link where each expense is tagged to a project at the point of claiming, recoverable items are identified from the appointment terms, and they are added to the next client invoice draft for approval.

A year of site visits, and the client paid for none of them

An engineer drives to site every fortnight for inspections on a project where the appointment says mileage and parking are recharged at cost. They claim the mileage through the practice's expense process each month, get reimbursed, and nobody tells accounts which project it belonged to. The invoices to the client never include it.

The same happens with printed drawing sets, courier costs for samples, and train fares to client meetings on jobs where travel is recoverable. Each item is small. Across all projects and a year, it adds up to money the practice has agreed to recover and never asked for.

Why disbursements slip

  • Expense claims record the cost, not always the project.
  • Appointment terms about recoverable expenses vary by client and are not visible when claiming.
  • Expenses are processed by accounts after the project invoice has been raised.
  • Mileage is claimed monthly as one line, not per trip.
  • Nobody reviews unrecovered expenses by project.

Appointment terms vary more than people expect. One client pays mileage at a set rate, another only for visits beyond a certain distance, a third includes all travel in the fee. The engineer claiming the expense has no reason to know which applies, and accounts has no easy way to look it up.

What the leak costs

GapConsequence
Expense not tagged to projectCannot be recharged
Recoverable terms not knownCosts absorbed on jobs where they are chargeable
Recharged lateClient queries old costs, harder to collect
Travel hidden in overheadsProject profitability looks better than it is

It also distorts pricing. When travel is absorbed into overheads, projects a long way from the office look as profitable as local ones. Directors then quote distant work on the same basis, and the practice keeps winning jobs that quietly cost more to run than anyone realised.

How we connect expenses to invoices

  1. Expense claims, whether through Xero Expenses, Expensify, Dext or a simple form, require a project for each item, with the engineer's recent projects listed first.
  2. Mileage is recorded per trip, with start and destination, so the site visit is visible.
  3. Each project's appointment terms for expenses are recorded once: recoverable or not, at cost or with uplift, which categories.
  4. Recoverable expenses are collected against each project automatically.
  5. When the next client invoice is drafted, recoverable items are added with supporting detail for the director to approve.
  6. A report shows expenses per project, recovered and unrecovered, so project costs are complete.

Whether an expense is recoverable is set by your appointment. We simply make sure the terms are applied every time.

We usually load expense terms for live appointments from your fee schedules first, then look back over recent expense claims to identify any recoverable items that were missed. Whether to recharge those retrospectively is your decision, but it gives a clear picture of the gap.

Engineers claim as before, with one extra field. Accounts no longer have to guess which trip belonged to which job. Recoverable costs appear on invoices without anyone remembering to add them.

Directors see the true cost of each project, including travel, which helps when pricing future work at a distance.

Is this leaking in your practice?

  • Expense claims do not always record a project.
  • Mileage is claimed as a monthly total.
  • Recoverable expenses are rarely on client invoices.
  • Appointment terms about expenses are not known to accounts.
  • You do not know travel costs per project.

FAQ

Frequently asked questions

The questions readers ask us after this guide.

Still have a question?

Ask us directly — a senior engineer will get back to you.

Ask about your project

Do engineers need a new expense app?

Usually not. We work with the tool you have and add project tagging where it is missing.

Can it calculate mileage automatically?

It can calculate distances from addresses using a mapping service, which the engineer confirms.

Will it add expenses to invoices without checking?

No. Items are added to invoice drafts for approval like any other line.

What affects the cost?

Your expense and accounts systems, and how varied your appointment terms are.

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