Tracking Reimbursable Expenses on Projects

A reimbursable expense is a cost you pay on a project that the client agrees to pay back, usually on top of your fee. Tracking them well comes down to three things: getting agreement on what's reimbursable before you spend, recording each expense against the right project with a receipt attached, and marking it as billable at the moment you log it. Most of the money lost on reimbursables isn't lost to disputes, it's lost to expenses nobody remembered to invoice.

What counts as a reimbursable expense

This depends entirely on your agreement with the client, which is why it's worth settling in writing before the project starts. Common reimbursables include travel and accommodation, materials bought specifically for the client's work, permits and filing fees, subcontracted services, shipping and delivery, and project-specific software or licenses.

What's usually not reimbursable, unless explicitly agreed, is your general overhead: your own tools, your everyday software subscriptions, your office costs. The gray area tends to sit around things like mileage, meals during travel, and equipment that outlasts the project. Naming those explicitly in the contract saves an awkward conversation later.

It's also worth agreeing on a threshold above which you'll get approval before spending. A client who's fine with a $60 delivery charge may feel differently about a $1,200 equipment rental they didn't know was coming.

How to track reimbursables without losing any

The failure mode is almost always the same: the expense gets paid, the receipt goes in a pocket or an inbox, and by invoicing time nobody can reconstruct which project it belonged to or whether it was billable. A few habits prevent most of that.

Record the expense the same day you incur it, while you still remember what it was for. Attach the receipt to the entry rather than filing it somewhere separate, since a reimbursable claim without documentation is the one a client is most likely to question. Assign it to the specific project immediately, because "which job was this for" is far harder to answer three weeks later. And mark it billable at entry time, so you're not re-deciding the billable question for fifty line items when you build the invoice.

Reviewing the project's billable expenses before each invoice goes out is a useful final check. It catches the ones logged without a billable flag, and it surfaces any expense that's grown beyond what the client expected. For the broader habit this sits inside, see expense tracking per job, and contractor expense tracking covers the wider set of costs contractors typically handle.

Invoicing and record-keeping considerations

When it's time to bill, most clients expect reimbursables itemized rather than rolled into a single line, with receipts available on request. Grouping them by category, travel, materials, subcontractors, tends to read more clearly than a chronological list of every purchase.

Keep the documentation after invoicing, too. How long you need to retain records, and how reimbursable expenses should be treated in your accounts, depends on your location and your business structure. Accounting treatment of reimbursables in particular, whether they're recorded as income and expense or passed through, varies by jurisdiction and by how your agreement is written. That's a question for a qualified accountant familiar with your situation rather than something to decide from a general article.

Frequently asked questions

What's the best way to track reimbursable expenses? Log each one against the specific project the same day, attach the receipt, and mark it as billable at the point of entry. Reviewing a project's billable expenses before each invoice catches anything that slipped through.

Should I get client approval before incurring a reimbursable expense? For anything beyond routine small costs, yes. Agreeing upfront on what's reimbursable, and setting a threshold above which you'll check first, prevents disputes when the invoice arrives.

How do I separate billable from non-billable project expenses? Decide at the moment you record the expense, based on what your contract covers, and flag it accordingly. Sorting it out later, from memory or from a receipt pile, is where errors and forgotten claims come from.

Do reimbursable expenses count as income? That depends on your jurisdiction, your business structure, and how your client agreement is written. It's a question worth putting to a qualified accountant rather than assuming, since the treatment isn't the same everywhere.

Tracking reimbursables with Project Expense Tracker

Project Expense Tracker organizes expenses by project, which is the structure reimbursable tracking depends on. You create a project per client engagement or job, set its budget, and log each expense with an amount, category, date, note, and receipt. Attaching the receipt at the point of entry means the documentation stays with the expense rather than in a separate folder.

Categories let you group reimbursables in a way that maps to how you'll invoice, and the note field is a practical place to record client approval or the agreement the expense falls under. You can view spending by project and by category, so pulling together what a client owes for a given project doesn't mean filtering a combined list. Each entry records who added it and when, useful when a team member incurs costs on your behalf, and you can invite members to a project with shared expense visibility. When you need to send documentation with an invoice, detailed PDF reports and CSV exports are available.

Project Expense Tracker records and organizes the expense side. It doesn't generate invoices or process client payments, so the billing itself stays in whatever system you already use for that.

Get started

If reimbursable expenses are slipping through unbilled, download Project Expense Tracker at projectexpensetracker.net/download and start logging them against the project they belong to.