My Invoicing Error


The other week, I agreed to copy edit a manuscript for someone.

When asked for a cost estimate, I used my past experience proofing book manuscripts to figure out how long it would take me to get through a 90-page manuscript. Then, I took that number and multiplied it by my hourly rate.

Three and a half hours into the project, it became clear to me that I had drastically miscalculated. The project could actually cost up to three times more than I had previously projected.

I was mortified.

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