IT Procurement
Perpetual or subscription: how to compare them honestly
The comparison is not simply capital versus operating expenditure. Here is the calculation that actually decides it.
· 6 min read
Where a publisher still offers both, the perpetual-versus-subscription question comes up at every renewal. It is usually argued on capital versus operating expenditure, which is a real consideration but rarely the deciding one.
The calculation that matters
Compare total cost over the period you will actually use the software, including the upgrade you will actually buy.
A perpetual licence at four times the annual subscription price looks like a four-year break-even. But perpetual licences do not stay current, and most organisations upgrade every three or four releases. Add that upgrade cost to the perpetual side and the break-even moves out considerably — often past the point where anyone can forecast confidently.
Conversely, organisations that genuinely run software until it stops working — and some do, entirely reasonably, particularly for stable production tooling — get real value from perpetual licensing that a subscription comparison understates.
The factors that decide it
How long you keep a release. Upgrade every year: subscription. Every five years or never: perpetual, if it is offered.
Whether you need current features. File format compatibility with clients and suppliers is the usual forcing function. If you exchange files with people on current versions, staying several releases behind eventually stops being a choice.
Headcount stability. Subscriptions scale down at renewal. Perpetual licences are a sunk cost you keep paying for in the sense that you cannot recover the money if the team shrinks.
Budget structure. For some organisations, particularly in the public sector, capital and operating budgets are genuinely not interchangeable. That constraint can decide it regardless of the arithmetic.
What is disappearing
Fewer publishers offer perpetual licensing each year, and where it survives it is often at a price that reflects a deliberate preference for subscription. Corel and Microsoft's LTSC releases are among the remaining mainstream options.
Where perpetual is available and genuinely suits your usage pattern, it is worth pricing properly rather than dismissing. Where it is not available, the comparison is moot and the useful question becomes which subscription term and edition fit.