Ad Spend & Growth Calculator

Compare what your ads cost with the profit they bring back today, and what it really takes to reach your growth target.

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AD SPEND CALCULATOR

Calculate Your Ad Returns

Two sides of one equation: what your ads return today, and what your growth target will really cost once ROAS starts to drop.

Keenfunnel · Ad spend estimateWe only see your exact numbers if you attach them to a request.

Currency
Business model
Scenario
Expected: ROAS drops 15% each time spend doubles.
01

Current Ad Performance

What your ads cost and bring back today.

Advanced assumptions
Your ad economics today, per month
02

Unit Economics

What each sale and each customer is worth to you.

Count customer value over
First sale is the cash view. Customer lifetime adds repeat orders, or the years a client stays.
Advanced assumption
Unit economics
03

Your Growth Target

Model the plan, not just the snapshot.

—
—true ROAS today vs. at your target
Your plan at the target
04

Your Results

Updated in real time as you move the sliders.

True ROAS today—
Monthly budget for your target—
Today
Profit after ads—Per month, after ad spend and other marketing costs
Cost per new customer (CAC)—Ad spend plus other marketing costs, per new customer
LTV:CAC—Lifetime gross profit per customer ÷ CAC
CAC payback—Orders it takes to earn back CAC
Your plan
Profit after ads at target—Per month, once the target budget is reached
Profit peak—Monthly ad spend where profit after ads tops out
Growth plan pays back—First month the plan beats staying at today’s spend
12-month profit vs. today’s spend—Extra profit after ads over 12 months

12-Month Cumulative Profit After Ads

Net of ad spend and other marketing costs.

Reach your target in 6 monthsStay at today’s spend

Where Each €100 of Ad Revenue Goes

First-sale economics: how today’s ad-driven revenue splits.

    Profit After Ads by Monthly Ad Spend

    Where extra spend stops paying.

    TodayProfit peakYour target

    What This Means for Your Business

      This Is a Snapshot. We Run It Live.

      A calculator shows one moment. We connect your ad platforms, store or CRM, so ROAS, CAC and profit update in real time and budget keeps moving to what works.

      How we calculate this
      • True ROAS. Reported ROAS × the share of reported revenue your ads really drive. For B2B: first-year revenue won ÷ ad spend.
      • New customers. Ad-driven orders × the share from new customers. For B2B: ad spend ÷ cost per lead × the share of leads your ads drive × lead-to-customer rate.
      • Break-even ROAS. 1 ÷ gross margin. In the lifetime view, repeat orders or the years a client stays are added to the margin.
      • Profit after ads. Ad-driven revenue × gross margin, minus ad spend and other marketing costs. In the lifetime view, the lifetime gross profit of the customers won that month.
      • CAC and LTV. CAC = (ad spend + other marketing costs) ÷ new customers. LTV = lifetime gross profit per customer.
      • Diminishing returns. Each time spend doubles, ROAS drops by 25%, 15% or 8% depending on the scenario (B2B: 35%, 25% or 15%).
      • Profit peak. The monthly spend where the next unit of spend brings back exactly its cost in gross profit.
      • Budget for your target. The spend that drives the extra revenue or customers you need on that curve. The linear estimate divides the extra revenue your ads must drive (B2B: new customers × first-year value) by today’s true ROAS, ignoring diminishing returns.
      • 12-month projection. Spend ramps up evenly to the target budget over the months you choose. For B2B, revenue from new spend arrives after your sales cycle.
      • Payback. The first month when cumulative profit on the growth plan catches up with staying at today’s spend.

      This is an indicative estimate, not a quote, forecast or guarantee. Diminishing returns follow a simple curve, and real accounts vary by channel, audience and creative. Validate the assumptions against your own data.

      Indicative estimate based on your inputs and common industry assumptions. It is not a quote, a forecast or a guarantee of results.

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      DIAGNOSIS

      Spend Without a System

      Most ad accounts aren’t short on data. What’s missing is a system that ties spend to margin, new customers and profit, while there’s still time to act.
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      SELF-CHECK

      Sound Familiar?

      Spot the signals, then the causes behind them. Every one of them has a fix.
      Spend runs on platform numbers
      Stalled
      Every platform claims the same sale, and the totals don’t match your revenue.
      Budgets are set by what feels safe, not by margin or target.
      ROAS looks fine, but profit doesn’t move.
      Each budget increase costs more per customer than the last.
      Nobody can say which campaigns bring new customers rather than repeat orders.

      SEE YOUR NUMBERS

      Spend runs on unit economics
      Scaling
      Targets come from break-even ROAS and max CAC, not platform defaults.
      Conversions are tracked server-side and deduplicated across platforms.
      Budget moves to what works while campaigns are running.
      Every campaign is judged on new customers and profit, not clicks.
      Spend, ROAS and CAC are reported in real time.

      BOOK A CALL

      Why spend stalls
      Cause
      Targets are copied from benchmarks instead of your own margins.
      Attribution trusts each platform’s own report.
      Budget changes land after the money is spent.
      Creative and audiences fatigue without a testing system.
      Repeat purchases and lead quality never reach ad decisions.

      SEE YOUR NUMBERS

      What a system changes
      Fix
      Break-even ROAS and max CAC are set per product and channel.
      Server-side tracking gives one source of truth for conversions.
      Live dashboards raise alerts on spend, ROAS and CAC.
      Always-on creative testing moves budget to the winners.
      CRM and lifecycle data feed back into bidding.

      BOOK A CALL

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      METHOD

      Built Into Every Campaign

      We don’t just raise or cut budgets. We rebuild how spend is measured, set and moved, starting from a verified baseline.
      1
      Verify the Baseline
      We check what your ads really drive: tracking, attribution and incrementality, so every gain that follows is visible.
      Set the Unit Economics
      Break-even ROAS and max CAC per product and channel, built from your real margins.
      2
      3
      Fix the Measurement
      Server-side conversion tracking, clean events and offline conversions, so platforms optimize for real customers.
      Scale With Live Guardrails
      Budget moves to what works while campaigns run, with real-time spend, ROAS and CAC dashboards.
      4
      5
      Keep It Compounding
      Always-on creative testing, bid and budget tuning, and lifecycle email that lifts repeat purchases, backed by real-time reporting and continuous optimization.
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      SERVICES

      Choose Your Entry Point

      Four ways to start, depending on where your growth is stuck.
      Attribution · Server-side tracking · Live CAC

      Paid Advertising & Attribution

      Ad spend you can watch working: clean conversion data, live CAC and constant budget tuning.

      • Real-time spend and CAC dashboard
      • Server-side conversion tracking
      • Budget moved to what works
      Creative testing · Budget optimization

      Social Media Advertising

      Social ads that keep testing creatives and move budget to what works while campaigns run.

      • A/B creative testing built in
      • Continuous budget optimization
      • Audience and creative refresh
      Lead-to-revenue · Drop-off alerts

      Acquisition Funnel Optimization

      See where leads drop off and fix each stage while it’s happening.

      • End-to-end lead-to-revenue tracking
      • Real-time stage drop-off alerts
      • Landing page and form fixes
      Repeat orders · Retention

      Lifecycle Email Marketing

      Behavior-based emails that bring customers back after their first order.

      • Behavior-based journeys
      • Always-on A/B testing
      • Repeat purchase and renewal flows
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      OUTCOMES

      What Changes

      The results we work toward. Exact gains depend on your starting point, which we measure first.
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      Spend That Pays for Itself
      Targets set from your margins, so every campaign is judged on profit, not reported ROAS.
      02
      Budgets Backed by Math
      A plan that shows what your growth target costs, including the efficiency you lose as you scale.
      03
      Growth You Can Watch Live
      Spend, CAC and profit after ads in real time, with budget moving continuously to what works.
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      GET STARTED

      30 Minutes. No Sales Pitch.

      Share your numbers and where growth is stuck. We’ll tell you honestly what to fix first, and what not to spend on.

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      008
      FAQ

      What Growth Teams Ask

      Straight answers about the calculator, the method and how an engagement works.
      1
      How do you calculate break-even ROAS?
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      Why is my true ROAS lower than what my ad platforms report?
      3
      What is a good ROAS?
      4
      Why does my target need more budget than a simple ROAS calculation?
      5
      What is the profit peak?
      6
      Should I judge ads on the first sale or the customer lifetime?
      7
      How does the calculator handle B2B lead generation?
      8
      Is the calculator result a quote or a guarantee?
      9
      What’s the first step?