What's a 'good' AEO CAC payback?

Best-in-class B2B SaaS AEO programs land at 3–6 months. Average is 6–12 months. Anything over 18 months is a yellow flag; over 24 means the channel isn't working for your ICP and you should reallocate.

Why is AEO CAC payback typically faster than paid search?

Three reasons: (1) AEO traffic has zero cost-per-click, (2) AI-referred buyers convert at 1.5–6x the rate of paid search, (3) AEO content compounds over time so cost amortizes across more customers as time passes.

How do I handle multi-touch deals in CAC payback?

Either give AEO 100% credit for first-touch deals (simple, slightly inflated AEO performance) or use a 40/20/40 W-shape model that gives AEO partial credit for assist deals (more accurate, more complex). Both are defensible if labeled clearly.

Should I include the cost of an AEO consultant in CAC?

Yes if the consultant directly produces or optimizes AEO content. No if the consultant works on broader strategy. The line: 'would I have hired this person if I weren't doing AEO?' If yes, exclude. If no, include.

How to calculate AEO CAC payback (2026)

AEO CAC payback is the months it takes to recover the cost of acquiring an AEO-attributed customer from their gross profit. For most B2B SaaS, you want this under 12 months. For the AEO channel specifically, well-run programs land at 4–8 months — dramatically better than paid search. Here's the math.

Required tools

AEO ROI report from HubSpot or Lantern (covered in measure-aeo-roi guide)
Finance-blessed numbers: gross margin %, customer lifetime, total AEO spend
A spreadsheet for the math
Optional: Lantern's free AEO ROI calculator

The steps

Define AEO-attributed customers: the set of new customers whose deal_ai_source != 'none'

Filter HubSpot Deal report: deal_ai_source is any of chatgpt, perplexity, claude, gemini AND deal stage = Closed Won AND closedate within last 90 days. This is your AEO-attributed customer cohort. Count = N customers.

Calculate AEO Customer Acquisition Cost: total AEO spend / N

Sum of AEO spend in the same window: tool subscriptions, content production fully-loaded cost, AEO consultant fees. Divide by N. Example: $7.5K spend / 12 AEO-attributed new customers = $625 AEO CAC. Compare against your blended CAC ($1500–$3000 for B2B SaaS) to see the AEO advantage.

Calculate AEO ARPU: average annual recurring revenue per AEO customer

Sum of Amount across the N customers / N. If those 12 customers brought in $96K total ARR, AEO ARPU = $8K. Note: AEO-acquired customers often have higher ARPU than blended because they self-served further before sales contact.

Calculate AEO Gross Profit per customer: ARPU × gross margin %

B2B SaaS gross margin typically 70–85%. Use your finance-blessed number. $8K AEO ARPU × 80% gross margin = $6,400 AEO gross profit per customer per year, or $533/month.

Calculate AEO CAC payback in months: AEO CAC / monthly AEO gross profit

$625 AEO CAC / $533 monthly gross profit = 1.17 months. Or, more conservatively, $625 / ($533/year × 1/12) = ~14 months if you compute on annualized monthly. Pick one convention and lock it. Most teams use monthly recurring gross profit, yielding the shorter number.

Compare AEO CAC payback against blended CAC payback

If your blended CAC payback is 14 months and your AEO CAC payback is 6 months, you have a budget-allocation case: shift incremental spend from blended channels to AEO until the payback equilibrates. This is the math that wins board-level capital reallocation.

Include LTV:CAC for the AEO channel as a secondary metric

AEO LTV:CAC = (AEO ARPU × average customer lifetime in years × gross margin) / AEO CAC. If AEO LTV:CAC > 5:1 (vs target 3:1), you're under-investing in AEO and should expand the budget.

Common mistakes

Using ARR instead of gross profit in the payback math — overstates AEO performance and finance will catch it.
Excluding content production cost from AEO CAC — content is the largest AEO line item; excluding it makes the channel look artificially cheap.
Computing CAC payback on annualized customers but quoting monthly gross profit — pick one time unit and lock it.
Not separating AEO from organic SEO when computing CAC — they're different channels with different cost structures and conflating them ruins both metrics.

Where this fits in the AEO pipeline attribution stack

The steps above are one link in a longer chain. In order: you pick prompts to monitor, you track AI-referred sessions, you tag contacts in your CRM, you roll attribution up to the Deal object, you report pipeline dollars to the CFO. If you skip any link, the chain breaks and the number you quote to finance can't be defended in an audit.

If you're still evaluating which tool to run this workflow on, Lantern's AEO tool comparison hub has honest head-to-head pages for Profound, Scrunch, Peec AI, AthenaHQ, and HubSpot's own AEO product — scored on the dimensions that matter for a CMO buyer (CRM integration depth, reporting quality, prompt-scaling economics).

If you're about to walk this work into a budget review, the CFO's Guide to AEO Budget Defense has the memo template, the five-slide deck structure, the attribution-math cheat sheet, and the three most-common CFO objections with counter-arguments. It's the long-form companion to this how-to and was written for the renewal conversation specifically.

The operational rhythm that works: run the steps above once to set up, then review the output monthly in a 15-minute standing meeting with your Head of Growth and RevOps lead. Quarterly, re-audit your prompt list, your content backlog, and your attribution lookback window. Annual: present the full-year AEO ROI trend to the board. That cadence is what separates teams who ship an AEO dashboard once from teams who run AEO as an ongoing budget-defensible channel.

How to calculate AEO CAC payback