The verdict in three sentences
A billing-automation module for a consulting firm costs between EUR 15,000 and 45,000 in 2026, depending on scope and integrations. The chain of time entry + recurring billing + reminders + accounting connection eliminates double entry and speeds up collection. Delivered in 6 to 12 weeks, it cuts DSO by 15 to 30% and frees several days of back-office work per month.
What the automation budget covers
Price depends mainly on the degree of automation and the connection to your accounting tool. Here is the 2026 order of magnitude for a consulting firm.
| Level | Features | Price | Timeline |
|---|---|---|---|
| Essential | time entry + invoice generation | EUR 15,000-22,000 | 6-7 wks |
| Standard | + recurring billing + auto reminders | EUR 25,000-35,000 | 8-10 wks |
| Advanced | + accounting connection + DSO dashboard | EUR 38,000-45,000 | 10-12 wks |
| Accounting connector | standardised export or API | +EUR 4,000-8,000 | +1-2 wks |
| Maintenance / year | support, evolutions | 15%/year | ongoing |
Recurring billing and automatic reminders weigh most on cash flow: they prevent oversights and shorten the collection cycle.
The impact on cash flow and back-office
Automation is measured in DSO days gained and administrative hours saved. Here are the estimated gains.
| Indicator | Before | After |
|---|---|---|
| Average DSO | 60-75 days | 45-55 days |
| Billing time / month | 3-4 days | 0.5-1 day |
| Forgotten invoices / quarter | 3-5 | 0-1 |
| Manual reminders / month | 20-30 | 2-5 |
| Data-entry errors | frequent | near zero |
A 20% DSO reduction for a firm billing EUR 1.5M a year permanently frees about EUR 60,000 of cash.
Mini case study
Thomas is CFO of a 25-consultant firm in Amsterdam, billing EUR 3M a year. He invests EUR 40,000 in an advanced module connected to his accounting, delivered in 11 weeks. DSO drops from 68 to 52 days, a 16-day gain: on EUR 3M, that frees about EUR 131,000 of cash. The back-office saves 3 working days per month, i.e. 36 days a year. Between the cash gain and the recovered hours, the project pays back in under 6 months.
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FAQ
How much does billing automation for a consulting firm cost in 2026?
Between EUR 15,000 and 45,000 depending on scope. An essential module of time entry + invoice generation starts at EUR 15,000, while a full chain connected to accounting reaches EUR 45,000.
How much can my DSO drop?
By 15 to 30% on average, thanks to automatic reminders and recurring billing. For a firm billing EUR 1.5M, a 20% DSO reduction frees about EUR 60,000 of cash.
Does the module connect to my accounting?
Yes, via API or standardised export. The accounting connector costs EUR 4,000-8,000 depending on the expected format and removes double entry between billing and accounting.
How much back-office time can I save?
Between 2 and 3 working days per month for billing, plus the near-elimination of manual reminders. For a 25-person firm, that is several dozen days a year.
What is the implementation timeline?
Between 6 and 12 weeks depending on the level. An essential module deploys in 6-7 weeks, while an advanced chain with accounting connection and DSO dashboard takes 10 to 12 weeks.
Let's scope your project. Tell us your annual billing volume, your accounting tool and your priorities (time, recurring, reminders, DSO): we quote the automation. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
