From billable hours to subscriptions: revenue models under automation
Automation erodes billable data-entry hours. How firms move to fixed pricing: model options, per-client calculations and the pitfalls to avoid.
The short answer
Automation makes hourly billing unsustainable for compilation and bookkeeping work over time: the hours you used to bill disappear, while the value to the client stays the same or rises. The answer is not to postpone automation, but to change the revenue model: a fixed price per period, based on the value and scope of the work rather than on time spent. That sounds simpler than it is. The transition requires a per-client calculation, a sharp definition of what the price includes, and a series of conversations with existing clients that you need to prepare well.
Why the hourly model is under pressure
The classic model rewards time spent. As long as bookkeeping was labour-intensive, that coincided with value delivered: more entries meant more hours meant a higher invoice.
Automation breaks that link. An administration that used to take half a day of data entry per month now largely runs itself: invoices are recognised and posted, the bank is reconciled automatically, reconciliations are monitored continuously. Bill by the hour and you watch revenue per client fall while quality rises. That is a strange outcome: the firm is punished for working more efficiently.
There is a second problem in the hourly model. It makes the invoice unpredictable for the client and revenue unpredictable for the firm. Fixed pricing solves both: the client knows where they stand, and the firm builds recurring revenue that does not depend on how many hours happened to be billable.
Fixed-price model variants
There is no single correct model. The three most common forms, with their strong and weak sides:
| Model | How it works | Strength | Weakness |
|---|---|---|---|
| Packages | Two to four fixed bundles (e.g. basic, plus, complete) with a fixed monthly price | Easy to explain and sell | Large clients in a small package erode the margin |
| Tiers by transaction volume | Monthly price rises with the number of entries or documents | Price moves with the work | Requires measurement and periodic recalibration |
| Tiers by entities and modules | Price per administration, plus add-ons for payroll, VAT, year-end, advisory | Fits holding structures and mixed services | Can become hard to follow with many options |
In practice firms combine these forms: packages as the base, with a volume cap per package and separate modules for work not every client takes, such as payroll or an extended month-end close. Advisory work often stays outside the bundle on an hourly or project basis, and that is defensible: advisory hours are not routine and do not fit well in a bundle.
Calculating the transition per client
The biggest mistake in the transition is laying one price list over the whole client base without knowing what each client currently costs and yields. The calculation does not need to be complicated, but it does need to be per client:
- Map the current situation. Revenue per client over the past twelve months, hours spent per staff level, and from that the effective margin.
- Estimate the situation after automation. Which hours disappear (data entry, reconciliation, standard checks), which remain (review, close, filings, contact) and which are added (judging exceptions, configuration).
- Set the fixed price. As a reference point: the new price sits at or slightly below the client\'s current annual bill, while the firm\'s margin rises because the cost base falls. Both sides win, and that is also the story in the conversation.
- Flag the exceptions. There are always clients who fit no package: strongly fluctuating volume, lots of manual work due to poor delivery of records, or fees that never covered the time spent. Those deserve an individual arrangement, or an honest conversation about parting ways.
Also calculate a year ahead. In the first year after the switch you carry double costs: setting up the automation takes time while the old way of working partly continues. The margin improvement comes after that.
Pitfalls
All-inclusive without boundaries. A fixed price without a description of what it covers is an open tab for the firm. Define per package what it includes, in numbers where possible: how many administrations, which filings, how many payslips, which delivery channel. And just as important: what it does not include.
Scope creep. The client with "just a quick question", every week. Under hourly billing the invoice corrected that automatically; under a fixed fee it does not. The solution is not to bill every question, because accessibility is precisely a selling point of the subscription. The solution is an agreed boundary: short questions are included, research and advisory work get a quote. Name that up front, not at the first overrun.
Basing the price on the old cost base. Derive the fixed price from today\'s hours and you freeze today\'s inefficiency into tomorrow\'s rate, pricing yourself out of the market as soon as competitors pass on their automation gains.
Migrating everyone at once. Start with new clients (they never knew the old rate) and a group of existing clients where the switch is clearly favourable. Do the difficult cases last, with the experience of the first groups behind you.
The conversation with existing clients
The announcement "we are moving to a subscription" raises one question in every client\'s mind: will I end up paying more? The conversation succeeds when you pre-empt that question with a concrete proposal: this is what you paid last year, this is the fixed price, and this is what you get for it. For most clients, predictability is an improvement, especially when the numbers are continuously up to date instead of three months after quarter-end.
Be honest about the reason. Clients know automation is happening. A firm that says "we work more efficiently and that translates into a fixed, predictable price" has a stronger story than a firm that quietly hides the old hours inside the subscription.
Expect a small share to leave or negotiate. That is not failure but a consequence of transparency: the hourly model concealed which clients were structurally underpaying.
The foundation: a cost base you actually know
A fixed price only holds if the cost per administration is low and predictable, and that is exactly what automation delivers. With Giroo, the processing of purchases, bank and VAT largely runs automatically and you can see per administration what is left outstanding, so you know which clients fit their package and where a conversation is needed. The tighter that foundation, the larger the share of the fixed price that is margin, and the more room there is for the work clients really pay for: watching, flagging and advising.