Two vendors will sell you a perpetual licence and three will only rent you one. Where the crossover actually sits, calculated from published prices, plus the four costs the model does not capture.
Mario Marin6 min read"Buy it once" is the most persuasive sentence in software procurement and one of the least examined. In hosting billing, two vendors will sell you a perpetual licence and three will only rent you one, and the crossover point between the two models is not where most people assume it is.
This post builds a three-year cost model from published list prices, read on 18 August 2026, and then says plainly where the model stops being useful.
How this was sourced. FluxBilling publishes this model and sells one of the products in it. Every competitor figure was read from the vendor's own pricing page on 18 August 2026; sources are linked at the end. Figures are quoted in the currency each vendor publishes and no exchange rate is applied. The model uses list prices with no discounts, excludes tax, and excludes per-ticket support charges. It is a shape, not a quote.
Perpetual licence: HostBill (four editions, $599 to $5,999, with a $125/year updates renewal after year one) and Blesta (five owned tiers, $350 to $1,495, with an optional $62/year support and updates renewal).
Subscription only: WHMCS ($9.99 to $84.95/month depending on ladder and client count), Clientexec ($16.95 or $19.95/month), and FluxBilling (€4.95 to €44.95/month).
Blesta is the only vendor here that will sell you either, at unlimited clients, which makes it the cleanest place to see the crossover without changing products.
Thirty-six months of subscription, or one licence plus two renewal years:
| Option | Model | 3-year list cost | Clients |
|---|---|---|---|
| WHMCS Cloud Starter | Subscription | $359.64 | 25 |
| Blesta Owned Branded + 2 renewals | Perpetual | $474 | Unlimited |
| Blesta Owned Unbranded + 2 renewals | Perpetual | $549 | Unlimited |
| Clientexec Branded Leased | Subscription | $610.20 | Unlimited |
| Blesta Owned Flex + 2 renewals | Perpetual | $624 | Unlimited |
| Blesta Monthly Branded | Subscription | $646.20 | Unlimited |
| Clientexec Unbranded Leased | Subscription | $718.20 | Unlimited |
| Blesta Monthly Unbranded | Subscription | $754.20 | Unlimited |
| HostBill Startup + 2 renewals | Perpetual | $849 | Not client-tiered |
| HostBill Enterprise + 2 renewals | Perpetual | $1,249 | Not client-tiered |
| WHMCS Plus | Subscription | $1,258.20 | 250 |
| Blesta Owned Lifetime | Perpetual, updates forever | $1,295 | Unlimited |
| Blesta Owned Lifetime Flex | Perpetual, updates forever | $1,495 | Unlimited |
| FluxBilling Professional | Subscription | €1,258.20 | 500 |
| FluxBilling Business | Subscription | €1,618.20 | Unlimited |
| HostBill Data Center + 2 renewals | Perpetual | $1,849 | Not client-tiered |
| WHMCS Professional | Subscription | $1,978.20 | 500 |
| FluxBilling Business self-hosted | Subscription + €500 once | €2,118.20 | Unlimited |
| WHMCS Business | Subscription | $3,058.20 | 1,000 |
| HostBill All-Inclusive + 2 renewals | Perpetual | $6,249 | Not client-tiered |
USD and EUR rows are not comparable to each other and are not converted. Sort within a currency, or read the structure rather than the ordering.
Blesta Owned Branded is $350. Blesta Monthly Branded is $17.95. Ignoring the renewal, the licence pays for itself in under 20 months. Add the optional $62/year renewal from year two and the owned route is still ahead of monthly across three years — $474 against $646.20.
HostBill Startup at $599 plus two renewals reaches $849 over three years. Against Clientexec Branded at $610.20 or Blesta Monthly Branded at $646.20, the perpetual licence is behind at three years and would pull ahead somewhere in year four or five.
So the honest summary of the crossover is: roughly 20 months at the cheap end, roughly four years at the mid range, and effectively never for the top HostBill edition unless you need what is in it. If you cannot commit to running the same platform for at least two years, the perpetual licence is not saving you money.
Growth. The client-tiered rows move. A provider on WHMCS Plus who crosses 250 clients moves to Professional and the three-year figure changes from $1,258.20 to $1,978.20 mid-model. The unlimited-client rows do not move at all. If you expect to double your client base inside the window, model the tier you will be in, not the one you are in.
Support you actually use. HostBill includes 10 to 100 support cases depending on edition, then charges $89 per ticket or $999 for 50. A difficult migration year adds a line the table above does not have. Subscription vendors generally fold support into the fee.
The security cost of not renewing. The whole appeal of a perpetual licence is that you can stop paying. On Blesta's non-Lifetime owned tiers, stopping means no more updates. A billing system holds payment records and tax data; running an unpatched one to save $62 a year is a poor trade, and the model should really assume you renew.
The second product. For providers with physical hardware, most of these platforms need a DCIM system beside them. EasyDCIM's colocation ladder starts at $499/year and its dedicated ladder at $699/year, which over three years is $1,497 or $2,097 on top of whichever row you picked. That single addition reorders the table completely.
Perpetual licensing is not really about money. It is about who controls the upgrade schedule. Owning a licence means a vendor cannot force you onto a new major version, cannot end-of-life the version you depend on while you still have modules pinned to it, and cannot raise a price you have already paid. That is worth something real, and it is the reason experienced operators keep choosing it even when the arithmetic is marginal.
Subscription is about who carries the operational risk. If the vendor is patching, backing up and keeping the thing current, and you can leave next month if it disappoints, you have bought optionality instead of control. Both are defensible. Neither is a discount.
FluxBilling is subscription-only and has no perpetual licence, so on the question this post is about, we sit firmly on one side. Business is €44.95/month with unlimited clients — €1,618.20 over three years — and the self-hosted edition adds a €500 one-time fee on top of an active subscription rather than replacing it, taking the three-year figure to €2,118.20. The licence stays bound to the subscription; it does not become yours.
Stating the obvious consequence: if you want to buy a hosting billing platform once and own it, FluxBilling cannot sell you that and Blesta and HostBill can. Blesta Owned Lifetime at $1,295 with updates forever is a materially different proposition from our three-year subscription figure, and a provider whose priority is licence ownership should buy it.
What our subscription includes that changes the comparison is the DCIM layer — rack management, hardware inventory, IPAM, network device tracking and bare-metal provisioning on every tier, plus WHMCS and EasyDCIM importers on every tier. If your alternative stack is a billing licence plus a DCIM subscription, add the second product's three-year cost to their row before comparing. If you have no second product, our row is simply a subscription like the others. There is no free trial; every plan carries a 14-day money-back guarantee.
See current pricing, how self-hosting works, and our earlier three-year TCO comparison of self-hosted vs SaaS deployment, which covers the deployment axis rather than the licensing one.
WHMCS, Blesta, HostBill, Clientexec and EasyDCIM are trademarks of their respective owners. This model is published by FluxBilling for evaluation purposes and is not endorsed by, affiliated with, or reviewed by any of them.
Every major hosting billing vendor ships an importer, and the best-supported one belongs to the incumbent. Here is what each tool reads, what it costs, and the five things none of them carry across.
Selling hosting across borders means VAT, GST, and US sales tax. Learn how to automate tax compliance with a self-hosted billing platform.
Involuntary churn from failed payments quietly drains recurring revenue. Learn how smart dunning management in a self-hosted billing platform recovers it.