Can a Matter Bill Both a Flat Fee and Hourly Time?

A matter can carry a flat fee for its core scope and add hourly time for anything outside that scope, and a single client can have some matters billed flat fee and others billed hourly, all within the same file.

Where hourly time fits inside a flat-fee matter

A flat fee covers a defined scope of work for a set amount. Anything genuinely outside that scope, an exclusion carved out at engagement, or work that runs beyond what the fee was meant to cover, can be billed hourly on the same matter without splitting it into two files. The mechanism is straightforward: the flat fee and the hourly time sit as two line items on the same matter’s invoice, not two competing billing structures fighting for the same record; this post is the short answer, and the deeper implementation guide, modeling a hybrid fee agreement in QuickBooks Online, is where to go for how to build it.

Why tracking internal time against a flat fee is a margin question

Hourly time billed to a client is revenue. Hourly time logged against a flat-fee matter for the firm’s own visibility is something else entirely: it’s how you find out whether the fee was priced correctly. If a timekeeper’s hours on a flat-fee matter, valued at their standard rate, come in under the fee, the matter carried margin. If they come in over, the fee was underpriced, and that’s worth knowing before the next matter of the same type gets quoted the same way. Tracking that internal time is what turns your next quote into a pricing decision wearing a billing tool.

This is also why the same flat fee can look profitable on one matter and unprofitable on the next, even when the scope on paper is identical. A matter that turns out to be more contentious than expected, or a client who needs more hand-holding than the fee anticipated, absorbs more internal hours without changing what’s owed. Without tracking that internal time, a firm only learns the fee was wrong when it happens again on a bigger scale, or when a partner notices margin thinning across a whole category of work without being able to point to which matters caused it.

When more than one timekeeper is involved

A flat-fee matter with several timekeepers logging time works the same way: LeanLaw tracks each person’s time against the matter separately, which is what makes it possible to see afterward whose work actually drove the cost of delivering the fee. That breakdown matters more as a firm scales flat-fee work across associates and partners with different rates, since the same flat fee absorbs very different amounts of margin depending on who did the work. A partner’s hour and an associate’s hour cost the firm differently, so two matters that consumed the same total number of hours against the same flat fee can still have very different margins depending on which timekeeper did the work.

One client, several matters, different billing structures

None of this is limited to a single matter. A client with three open matters at the same firm might have one billed as a flat fee, another billed hourly, and a third billed as a hybrid of both, and each matter’s structure stands on its own rather than forcing the client into one billing method across every file. That flexibility matters most for clients whose relationship with a firm spans different kinds of work over time, a flat-fee incorporation followed by hourly ongoing counsel, say, where treating every matter the same way would misprice at least one of them. It also means a client’s flat-fee and hourly matters can go out as separate invoices, or combined onto a single one; which approach a firm prefers usually comes down to how the client expects to see the bill, not a limitation of what the billing structure supports.

A worked example

Say a firm quotes a flat fee of $2,000 for a matter with a defined scope. Two timekeepers log a combined total of hours that, at their standard billing rates, would have been worth $2,800 if billed hourly. The client still owes $2,000; that’s the fee. But the firm now knows this matter cost $800 more in time than the fee covered, information that’s only visible because the hours were tracked against the matter even though they weren’t billed separately. The next time a similar matter comes in, that gap is the number worth revisiting before quoting the same flat fee again, and it’s the kind of pattern a reusable flat-fee template can carry forward instead of relearning matter by matter.

What this depends on

• How your engagement letter defines the flat-fee scope versus what counts as an exclusion or overage
• Which timekeepers log time against the matter, and at what internal rate you value their hours
• Whether flat-fee revenue is recognized at completion or spread over the life of the matter
• How your chart of accounts separates flat-fee revenue from the cost of delivering it

Related questions

Can more than one timekeeper bill on the same flat-fee matter? Yes. Each timekeeper’s time is tracked against the matter separately, which is what lets a firm see later whose work drove the cost of delivering a flat fee.

What happens if the hours on a flat-fee matter run past what was expected? The fee itself doesn’t change unless the engagement letter defines an overage the client is billed for separately. Short of that, hours beyond what was priced into the fee show up as a margin question for the firm, not an additional bill to the client.