For decades, a marketing budget was mostly a headcount and media spend budget, salaries on one line, ad spend on another. A new line item, the cost of the compute powering the AI systems doing an increasing share of the actual work, is growing underneath both of those, almost unnoticed. It shows up as a software subscription today, but the underlying economics are computational, not headcount-based, and that changes how the budget should be modeled and forecasted. Startups still budgeting marketing like it is 2020 are going to be surprised by how fast this line grows, a forecasting shift Litmus Universe builds directly into client planning.

The old budget shape

Salaries and media spend were the two dominant lines, and both scaled roughly with headcount and campaign volume, predictable in the way spreadsheets like.

The new line hiding inside software costs

Compute costs for AI-driven marketing work are currently bundled inside subscription fees, which hides how quickly they will scale with usage rather than headcount.

Why this changes forecasting

A cost that scales with usage instead of people behaves differently in a model, it can spike with a successful campaign instead of only with a new hire, and budgets built for the old shape will be caught flat-footed.

Model the new shape now

Model the compute line separately before it surprises you inside next quarter's software invoice. Litmus Universe builds that forecast with clients while it is still a planning exercise, not a scramble.