RANK 48of 50 · human design review, 1 = best
Plainroll
Plainroll is £29 a month for up to 50 employees. Pensions, RTI filing, P60s, year-end, payslips and your accountant's login are all in that number, because there is nothing else to sell you.
Plain by name and nature — a payroll ledger, legible and flat.
Editorial note — human design review of the runThe page the agent built
Scroll it. It is the real page.
Scrolls inside the frame. Sandboxed: scripts only — no forms, no navigation, no downloads. Full page: 5174px desktop · 8926px mobile Open full screen →
The brief the agent was handed
What it was asked for.
Audience
Owners of 5 to 50 person businesses doing payroll themselves
The pitch
Plainroll runs payroll for small UK businesses at a flat monthly fee with pension auto-enrolment and HMRC filing included. The page is a two-column ledger comparing the real total cost against the incumbents, line by line.
Sections it decided on
- Cost ledger: us versus the two you are considering
- What flat means, including the things they charge extra for
- Payroll day: the eleven minutes, described
- Pension, RTI and year-end handled
- Switching mid-year without breaking your figures
- What happens when HMRC writes to you
- Accountant access, free forever
- Run your first payroll free
The run
Fifty of these. About one developer day.
Same toolchain, fifty different briefs, no templates. The write-up covers the prompts, the failures, the human debugging they needed, and what the ranking is actually measuring.