The way businesses pay for software is changing. For years it was a fixed price for each user, easy to forecast a year ahead. AI tools are billed differently, by how much work they do, counted in tokens, the small units of text a model reads and writes. The bill now moves with usage, and usage is climbing fast.
Across the companies the finance platform Ramp tracks, average monthly spending on AI tokens has risen 13-fold since January 2025. Among Ramp customers that pay for AI, the median company now puts nearly 15% of its software budget into these tools. A single prompt change or an agent left running can multiply a bill overnight, and Ramp says most finance teams find out only when the invoice arrives.
Forrester surveyed more than 2,600 business and technology leaders and found 82% expect their budgets to rise in 2027, with AI a main reason. Its warning to them was plain: ordinary cost tracking was not built for usage-based AI, and the teams that already manage cloud spending should take the job on next year.
Software used to be a fixed line a finance chief could set and leave alone. It is becoming a variable cost closer to an electricity bill, one that has to be watched and tied to a team or a project. Ramp released a free tracker on July 16, open to non-customers, that pulls spending from OpenAI, Anthropic and Google's Gemini into one view by team and project.