Marketing Budget Calculator for Startups (2026)

What it does. Sizes a defensible marketing budget from your stage, ARR, growth target, and business model, using AAJ's 2026 benchmarks across SaaS, DTC, marketplaces, and services. Output is a recommended monthly spend plus a channel mix you can take into a board meeting.

When to use it

Run the calculator before annual planning, before raising a round (to defend the "marketing line" in your model), or whenever growth is accelerating or slowing materially. It replaces the "12% of revenue" rule of thumb with stage-adjusted ranges.

What you'll need

  • Current ARR or revenue run-rate
  • Stage (Pre-seed → Series B+)
  • Growth target for the next 12 months
  • Business model (B2B SaaS, DTC, marketplace, services)
  • Average sales cycle (B2B only)

How the math works

The calculator blends two methods. First, a top-down benchmark band — for example, Seed B2B SaaS typically runs 25–60% of ARR on marketing, Series B usually 15–25%. Second, a bottom-up CAC×pipeline calculation: target net-new ARR ÷ ACV = customers needed, customers ÷ funnel rates = required leads, leads × cost-per-lead = required spend. The recommendation is the higher of the two with a sanity check against runway.

How to read the output

Look at three numbers: recommended monthly spend, implied CAC, and implied LTV:CAC at your reported margins. If LTV:CAC drops below 3:1 at the recommended spend, the growth target is too aggressive for current unit economics — either raise prices, improve retention, or reduce the target.

Related tools & playbooks

Pair this with the Unit Economics Calculator for CAC/LTV, the 2026 Marketing Budget Benchmarks Report for raw data, and the Paid Media Budget Allocation Playbook for splitting the budget across channels.

FAQ

What percent of revenue should a startup spend on marketing?

It depends on stage and model, not a single ratio. Seed B2B SaaS typically runs 25–60% of ARR; Series B 15–25%; profitable services businesses 5–12%.

Does the calculator include salaries?

Yes — the recommended figure is "all-in marketing," including headcount, agencies, software, and media. A separate line breaks out media-only spend.

How often should I rerun the calculator?

Once per quarter, or any time ARR moves more than 20% or the growth target changes.