Guides and tools for running an agency
Most of this is useful whether or not you use Sumhour. The calculators run in your browser and send nothing to us.
Guides
Longer reads on the work itself
- Get startedFrom a new workspace to your first timer, project and invoice.
- Move from HarvestPrice at your team size, what is on which plan, and how the import works.
- E-invoicing in GermanyWho must send e-invoices from 2027 and 2028, the exemptions, XRechnung and ZUGFeRD.
- Peppol in BelgiumThe duty since 2026, who it covers and what Sumhour does today.
- Open-source optionsKimai, solidtime, Invoice Ninja and Sumhour, side by side.
Blog
Researched and read by a person
Free tools
In your browser, no sign-up
- ROI calculatorWhat better time tracking could be worth, from your own numbers.
- Hourly rate calculatorThe rate that covers your team cost and overheads, and the rate for your target margin.
- Utilization calculatorBillable hours against capacity, and what the gap to your target is worth.
- Invoice templateHours, rates and tax worked out as you type, then printed or saved as a PDF.
Help
When you are stuck
