O
Glossary
On-Premise Billing
On-premise billing is a deployment pattern in which the billing system runs on hardware the company owns, inside its own data centre or a sovereign facility, never in a vendor's cloud. Usage records, invoices, and customer identifiers stay behind the corporate network boundary, and in-house staff perform every upgrade.
Key Takeaways
On-premise is the strict case of running billing yourself, because a private cloud tenancy still runs on a hyperscaler's machines.
India's RBI notification RBI/2017-18/153 requires payment system data to be "stored in a system only in India".
GDPR Article 44 makes any transfer of personal data to a third country conditional, and invoices carry personal data.
An air-gapped install kills vendor telemetry, so your operators package diagnostics by hand on every ticket.
What does an on-premise billing deployment actually include?
Far more than the billing application. You take on the hardware, the network boundary, and the release process a hosted vendor hides. A deployment inside your own walls carries:
Machines in a facility you or your colocation partner control, sized for month-end close, not an average Tuesday.
A network boundary that decides whether the system reaches the internet at all. In a no-egress install, licence checks, telemetry, and hosted tax lookups need local substitutes.
Release artifacts you pull into your own registry, and authentication bound to your directory over SAML or LDAP.
Backup and failover drills your operators own, with the invoice and subscription stores as the first recovery target.
The wider category is self-hosted billing, which also covers your own VPC on AWS, Azure, or GCP. On-premise narrows it: the metal is yours.
Which requirements force billing on-premise instead of into a private cloud?
Rules that bind where the bytes rest, and rules that bind who can reach the system. A dedicated tenancy clears neither when the hardware belongs to a hyperscaler. The ones I watch force a data centre deployment:
Payment data localisation. The Reserve Bank of India's Storage of Payment System Data notification, RBI/2017-18/153 of 6 April 2018, says "All system providers shall ensure that the entire data relating to payment systems operated by them are stored in a system only in India".
Cross-border transfer limits. GDPR Article 44 says a transfer to a third country "shall take place only if ... the conditions laid down in this Chapter are complied with". Local hardware removes the transfer rather than documenting it.
Sovereignty regimes. Saudi Arabia's Personal Data Protection Law restricts transferring personal data outside the Kingdom, with the Saudi Data and AI Authority setting the terms.
Accredited networks. Defence and critical infrastructure programmes accredit environments with no internet path, so a hosted service isn't an option.
Tax mandates. An e-invoicing mandate can pin invoice records to a country.
Flexprice is enterprise-grade, open source usage based billing infrastructure for AI and SaaS companies. It can be deployed in your own VPC, on-prem, or on Flexprice's managed cloud. On-prem means your own data centre in any geography, which is what the RBI clause above asks for, and Billing and Invoicing behaves there as on the managed cloud. Check the plan before a security review: managed VPC, on-premise, and air-gapped deployment sit on Mission Critical, not the free self-hosted build, and SOC 2 Type II certifies Flexprice as an operator, not your environment.
"We weren't willing to give up control of our data, but we still needed a reliable subscription tool. Flexprice on-prem was the only thing that worked for us." - Martin Sønderkær Jung, CTO
If an auditor is already asking where your billing data sits, book a demo.
What does running billing on-premise cost you?
Money you can forecast and latency you can't. The licence line is the easy part, and the surprises follow from the vendor losing sight of the system.
Cost line | What it looks like once you're live |
|---|---|
Operators | A named rota for software you didn't write, staffed through every close |
Upgrade lag | Your change window and testing, so you run an older build |
Blind support | No vendor telemetry, so each case starts with your team packaging logs |
Exit cost | A billing system migration you run yourself |
Blind support bites hardest: a thirty minute fix stretches into a multi-day loop. None of this rules out on-premise when a contract requires it, but cost it like a build vs buy decision.
Related terms
An on-premise decision arrives bundled with these:
Self-Hosted Billing is the wider model, your own VPC included.
Open Source Billing answers licensing, not location.
E-Invoicing Mandate pins invoice storage to a country.
Billing System Migration is the work if it ever moves.
Build vs Buy (Billing) is the comparison this shortlist hits.
Event Ingestion carries the throughput you now size yourself.
FAQ
Is on-premise billing the same as self-hosted billing?
Not quite. Self-hosted covers any infrastructure you control, a cloud VPC included. On-premise means your own data centre or an accredited sovereign facility. Every on-premise deployment is self-hosted, but plenty of self-hosted ones run on rented cloud hardware.
Can an on-premise billing system run fully air-gapped?
Yes, if the product ships without mandatory outbound calls. It needs offline licensing, a local registry, and substitutes for whatever the vendor normally resolves online, tax rate lookups included.
Does deploying billing on-premise make you compliant with data residency rules?
No. Location is one control among many, and a regulator still expects access logging, retention limits, and evidence the controls work. On-premise removes the transfer question and leaves the rest in place.
How do you upgrade an on-premise billing system without dropping usage events?
Buffer the ingestion path and upgrade outside the close window. Events queue while the application restarts, migrations stay forward-compatible so both versions read the store, and you reconcile counts afterwards.
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