All work
Tessel
·
2026
·
Web app
Invoices people stop asking about
A redesign of Tessel's billing area that cut invoice questions to support by more than a third.
ROLE
Lead designer
TEAM
2 designers, 6 engineers, 1 PM
TIMELINE
5 months
PLATFORM
Web app

THE PROBLEM
Tessel customers paid on time but could not tell what they had paid for. Invoices listed seat counts and usage in one long table, credits appeared on a separate page, and exports only worked one month at a time. Finance teams wrote to support every month-end to ask which line was which, and the support team had a saved reply for it. Closing a month took our biggest customers eleven working days.
OUTCOMES
−38%
invoice tickets
2.1×
self-serve exports
2 days
to close a month
PROCESS
Research
I read four months of support tickets tagged billing and sorted them by the question behind them. Three questions covered most of them: what changed since last month, why a credit was missing, and how to get the data into a spreadsheet. I then sat in on six month-end calls with finance teams at customer companies, watching them reconcile our invoice against their own records.
The pattern was the same each time. People were not confused by the numbers; they were confused by where the numbers lived. Usage was on one page, credits on another and the PDF on a third.
I also asked the support team to forward every billing ticket to a shared channel for two weeks, so the engineers saw the questions as they arrived rather than in a summary at the end.
Decisions
We rebuilt the invoice as one page with three parts: a summary that names what changed, a line for every product with its own usage chart, and credits shown inside the line they apply to. Exports became a single button with a date range, CSV or the accounting format the customer already used.
If a finance team needs to ask us what a line means, the line is wrong, not the finance team.
I kept the old table available behind a toggle for the first two months, so nobody lost a workflow overnight.
Shipping
We released to twenty customers first, then to everyone over three weeks. Support tracked the billing tag weekly. By the third month-end, invoice questions were down 38% and exports had more than doubled, mostly from customers who had never used them before. Closing a month went from eleven working days to two.
The biggest surprise was who used the new export. Account managers started sending it to customers before renewals, which nobody had planned for, so we added a share link in the next release.


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