The Afternoon I Found Unbilled Work From Three Months Ago

Just Cleaning Out Files

I wasn't looking for anything. I was doing one of those slow Friday afternoon file cleanups, the kind where you tell yourself you're being organized.

I opened an old project folder. The project had wrapped in late spring. Client was happy. Invoice had been sent and paid.

Except there was a subfolder I hadn't opened in months. Inside it was a series of exported files, revised drafts, and a text file I used to log notes during sessions.

I opened the text file.

Four days of work. Specific tasks, timestamps I'd jotted down by hand, notes about what I'd done and why. Work I had completely forgotten to invoice.

The Math I Didn't Want to Do

I sat there and added it up anyway.

Roughly eighteen hours. Work I had done, completed, and delivered as part of the project. Work the client had benefited from. Work that had simply never made it onto an invoice because it happened during a chaotic stretch when I was also juggling two other clients.

At the rate I was billing that client, eighteen hours was $2,160.

The project was three months closed. The client had already filed it away. There was no graceful way to send an additional invoice. I briefly considered it, wrote a draft, and deleted it. The moment had passed completely.

How It Happened

That project had a weird middle section. The client went quiet for two weeks, then came back urgent. I did a burst of work to catch up, tracked pieces of it in various places, and then moved straight into finishing the project when they approved the direction.

The invoicing didn't happen in sync with the work. I billed based on what I remembered when I sat down to close it out. That burst of catch-up work during the weird middle section didn't make it into my memory when I wrote the final invoice.

I hadn't been using a proper time tracker then. I had notes, text files, a running doc that I updated when I remembered to. All of that lived in different places and I had to reconstruct the work manually every time I invoiced.

Reconstruction is where things get lost.

What Reconstruction Actually Costs

When you invoice from memory or from scattered notes, you're doing archaeology on your own work. You're trying to dig up something that's already buried under three weeks of other projects.

You find most of it. Maybe eighty percent. The missing twenty percent is always the work that happened in unusual bursts, at odd hours, during the messy handoff between project phases.

That twenty percent isn't trivial. On an eighteen-hour batch, it was four hours. On a bigger project it could be much more.

And you never know what you missed, because you don't know what you can't remember.

The System Fix

After that Friday I started treating my time tracker as the source of truth for every invoice, not my memory and not my notes.

Before I close out any project now, I pull the full tracked log for that client and scroll through the entire thing. Not just the last few weeks. All of it. Because the work that gets missed isn't usually recent. It's the stuff from the weird middle.

I also stopped letting invoices lag more than two weeks behind the work. Not for cash flow reasons, though that helps. Because the further the invoice gets from the work, the more gaps open up between what happened and what I bill.

That subfolder cost me $2,160. I didn't lose it to a bad client or a scope dispute. I lost it because my invoicing system had a hole in it and I hadn't noticed yet.

Now I notice.

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