How to Switch Billing Rates Mid-Project Without Losing Track of What Was Billed at What Rate

Rate changes mid-project happen more than people plan for. A client approves a higher rate for rush work. You bring in a subcontractor at a different rate. A retainer gets renegotiated after month three. A new service type gets added to an existing project.

If your time tracker doesn't handle this cleanly, you end up doing math in your head at invoice time. Or worse, you apply the wrong rate to the wrong hours and nobody catches it until the client does.

Here's how to handle a mid-project rate change in Time-Trak without turning your invoice into a guessing game.

Understand What You're Actually Splitting

Before you change anything in the software, be clear about what changed and when. Write it down somewhere. The date the new rate takes effect. The old rate. The new rate. Whether the change applies to all work on the project or only specific task types.

Vagueness here becomes a billing problem later. If you know the new rate applies starting on a specific date, you can filter your time entries by date at invoice time and apply the correct rate to each group.

Create a Separate Task or Phase for the New Rate

The cleanest approach is to treat the rate change as a new phase. In Time-Trak, add a task or phase to the project that reflects the new rate context. Something like: Phase 2 Rush Rate or Subcontractor Work or Revised Retainer Scope.

Log all work under the new rate into that phase going forward. Your existing hours stay in the original phase at the original rate. When you build the invoice, you're pulling from two clearly labeled buckets, not trying to split a single pile of time entries by date.

This takes two minutes to set up and saves twenty minutes of untangling at invoice time.

Update the Billing Rate in Time-Trak Before You Log the Next Hour

Whatever task or phase you're using for the new rate, update the billing rate on that entry before any time gets logged under it. If you log three days of work and then change the rate, you'll need to review every entry manually.

Make the rate change the first thing you do when the new agreement is in place. Open the project, update the rate on the relevant task, and start logging. That's the right order.

Keep a Short Note in the Project

Add a project note that records the rate change. Date, old rate, new rate, and why. This is not for the client. It's for you.

Three months from now when you're closing out the project and trying to remember why there are two different rates in your report, that note is the thing that saves you. Without it, you're reconstructing the conversation from email.

What to Do When You Forgot to Update the Rate Before Logging

It happens. You log four hours at the old rate and then realize the new rate should have applied. In Time-Trak, you can edit time entries individually. Go back, find the entries that should be under the new rate, and correct them.

Be careful to only edit entries from after the rate change took effect. Leave everything before that date alone. If you're not sure which entries to change, sort by date and work through them in order.

What the Invoice Looks Like

When you're ready to invoice, you should have two line items if the rates are different. Hours at Rate A and hours at Rate B. That's it. Clients can see the split clearly and the math is obvious.

If the split is confusing to explain, that's a sign the project phases weren't labeled clearly enough. Go back and rename them before generating the invoice.

A clean invoice with two rate lines is much better than a single total with a note that says rate varied. One of those answers the question. The other creates more questions.

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Time-Trak is a native Mac and Windows time tracker with a floating timer, automatic screenshots, and one-click invoicing.

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