1
Completeness
Delivered work must be fully captured or billable hours are quietly lost. Realisation rate is the leading KPI.
Billing process: how do we convert work into revenue quickly and completely?
In many professional services firms the billing process holds the biggest quick win. Complete time capture, clear billing rules, short cycle time and a reliable forecast improve revenue, margin and liquidity at the same time.
Three levers that turn into cash
2
Speed
Shorter cycle time means better liquidity. Target: days, not weeks, between work and invoice.
3
Forecast
Open projects and booked hours create a revenue forecast that lifts planning confidence dramatically.
Billing process structure
- 1
Time and work capture
Hours, fixed fees, materials and travel cost are booked on the project promptly, ideally daily, weekly at the latest.
- 2
Approval
Managers review and approve hours before invoicing. Disputed entries return with a comment.
- 3
Invoice proposal
Approved work and billing rules produce an invoice proposal per client, project or contract.
- 4
Review and send
Project lead or finance reviews the invoice and sends it as PDF, ZUGFeRD or XRechnung to the client or portal.
- 5
Dunning
Open receivables flow through automated dunning stages. Incoming payments reconcile automatically and close open items.
- 6
Analysis
Forecast, margin per client, realisation rate and cycle time flow into the management dashboard.
Key KPIs in the billing process
1
Revenue (actual)
Sum of invoices issued per period. Core performance metric, split by client, project and service.
2
Invoice cycle time
Time from work to invoice. Shorter is better for liquidity. Green: below 14 days, red: above 30 days.
3
Realisation rate
Billable hours over total hours. Exposes hidden project losses.
4
Revenue forecast
Expected revenue from open projects, contracts and pipeline. Green: at least 90 percent predictable.
5
Days sales outstanding (DSO)
Average time from invoice to payment. Directly hits cashflow and liquidity.
6
Share of e-invoicing
Share of electronically sent and machine-processable invoices. Mandatory for B2G and from 2025/2026 standard in B2B.
Automation
From timesheet to ready invoice in one click.
The decisive jump in billing sits between Level 2 and Level 4. Instead of copying hours from a time list into an invoice form, teamspace turns approved work into an invoice proposal that finance only reviews and sends.
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Hours become invoices
Approved project hours, fixed fees and travel cost flow into the invoice proposal. No CSV export, no double entry.
-
ZUGFeRD and XRechnung as standard
Invoices are created hybrid (PDF + XML). B2G obligations and B2B requirements are covered out of the box.
-
DATEV export included
Posting records are exported to accounting, including cost centres and tax codes.
Billing maturity
Level 0: unplanned
Invoices issued ad hoc, often at quarter end. Completeness of work capture cannot be verified.
Level 1: manual
Invoices created in Word or spreadsheets, hours collected separately. High manual effort.
Level 2: structured
Invoicing software in use, time capture separate, manual transfer of line items.
Level 3: assisted
Hours and projects as billing source, invoice proposal with review. ZUGFeRD/XRechnung available.
Level 4: largely automated
Automated invoice creation by rules, forecast, multi-stage dunning, DATEV export.
Level 5: fully automated
Real-time invoicing, automated dunning, automated reconciliation, integrated forecast through to liquidity.
Classic billing vs. teamspace
| Feature | Classic (billing tool + spreadsheets) | teamspace billing process |
|---|---|---|
| Work capture | Hours in spreadsheets, consolidated manually | Hours, fees and expenses at the project, approved |
| Invoice creation | Manually per invoice, high error rate | Invoice proposal from project data, review instead of typing |
| E-invoicing | Separate tools, often only PDF | ZUGFeRD and XRechnung as standard, B2G covered |
| Dunning | Manual from memory, often too late | Automated stages with custom text |
| Forecast | Gut feel | Forecast from open projects and pipeline |
| DATEV handover | CSV, manual | Automatic export with cost centres and tax codes |
Relevant teamspace modules
1
Invoicing software
Quotes, orders, invoices, dunning, with all B2B standards.
Learn more 2
Billing tool
Recurring invoices, subscriptions, fixed fees, contracts and mixed models.
Learn more 3
E-invoicing
Create, validate and send ZUGFeRD and XRechnung, B2G compliant.
Learn more 4
Dunning
Multi-stage dunning with configurable text and escalation.
Learn more 5
Order billing
Orders with billing rules, partial invoices, final invoice, advance payments.
Learn more 6
DATEV export
Posting records and invoices to accounting, including cost centres.
Learn moreWhy billing often leaves the most money on the table
In many professional services firms billing is surprisingly inefficient. Work is not captured completely, invoices are issued late, revenue forecasts are vague. The immediate consequence: liquidity is tied up unnecessarily, billable work is quietly lost, and management has no reliable view on upcoming revenue.
An automated billing process delivers complete work capture, faster invoicing and precise revenue forecasts. The impact is direct on cashflow and margin, without winning a single new client.
Where maturity shows in billing
Maturity is not the brand of your invoicing software. It comes down to four points: is all work captured, is it approved and invoiced within a week, are receivables dunned and reconciled automatically, is there a forecast management trusts?
If multiple answers are ‘rather no’, you are typically on Level 1 or 2. The jump to Level 3 or 4 is often the fastest visible value an integrated steering system delivers.
Target picture: days instead of weeks, complete instead of selective
A high-maturity billing process is fast, complete and predictable. Hours are current, invoices come out of project data, ZUGFeRD and XRechnung are standard, dunning runs automatically and forecast is a core figure in business steering. Administration becomes lived liquidity steering.
Frequently asked questions about billing
We invoice at month end today. What is the problem?
Cashflow. Every day between work and invoice adds a day to receivables. Waiting four weeks means roughly 14 days of liquidity sit idle. Beyond that, the risk of incomplete capture is much higher with a monthly batch.
What is the difference between ZUGFeRD and XRechnung?
ZUGFeRD is a hybrid format: a PDF with embedded XML, readable by humans and machines. XRechnung is pure XML, required for invoices to German public authorities (B2G). teamspace supports both as standard, the recipient decides.
What does the German e-invoicing obligation mean for our B2B business?
From 2025 companies in Germany must be able to receive e-invoices, from 2026/2027 increasingly also send them (staged by revenue). teamspace is compliant from day one, both as recipient and sender.
How reliable is the revenue forecast really?
Very reliable when three sources are clean: open contracts with remaining value, open orders with remaining work and a weighted sales pipeline. teamspace combines them into a forecast over the next 1 to 12 months.
Does the realisation rate really help us in practice?
Yes, it is one of the most valuable KPIs. When it drops, invisible project losses appear. A realisation rate of 80 percent instead of 95 percent means 15 percent fewer billable hours. On a consulting margin that quickly turns into six- or seven-figure numbers.
How do billing rules that vary by client fit the process?
teamspace knows several billing models: time and material, fixed price, fixed fee, maintenance subscription, tickets against a contingent, mixed contracts. Each contract or order carries its model, the logic generates the right invoice proposal automatically.
Other processes
How many days sit between work and invoice today?
In a 15 to 30 minute requirements call we score your billing process against the maturity model and outline the biggest concrete lever.