Module 6: Numbers and Budgets

A buyer who can't do the client's math is a passenger. This module starts with unit economics — the break-even numbers you calculate before a dollar moves — then allocates a budget across prospecting, retargeting, and testing, and ends with packaging your own fee so the way you're paid matches the way you work.

Unit economics: break-even CPA and ROAS, before you spend a dollar

Before any campaign launches, you need two numbers from the client: the selling price, and the margin — what's actually left from each sale after the product, shipping, and fulfillment costs, before ads. Multiply them and you get the break-even cost per acquisition: the most you can pay for a customer without the sale losing money. An $80 product at a 60% margin leaves $48 for ads, so break-even CPA is $48. Divide 100 by the margin percentage and you get break-even ROAS: at 60% margin, every ad dollar must return $1.67 in revenue just to tread water.

Break-even is the ceiling, not the target. Aiming to "hit" break-even means aiming to make your client nothing. Set the working target below it — the gap is their profit and your safety margin for bad weeks. And treat this math as a screening tool, not just a reporting one. If a client's break-even CPA is $9 and clicks in their market cost $4 each, the ads would need one buyer in every two clicks. That's not a media problem you'll solve with clever targeting; it's an offer problem, and the honest conversation happens before the first campaign, not after the first invoice.

The calculator below runs the numbers. Play with the margin especially: watch how a thin margin makes break-even ROAS climb fast — dropping from 60% to 30% margin takes the break-even return from 1.67 to 3.33, which is why two stores selling the same product at the same price can have completely different advertising realities. This is also the math you'll use in every client report for the rest of your career.

Break-even builder

Enter a product's price, margin, and click cost — the break-even lines update live.

Product price ($) Margin (%) Cost per click ($)

Break-even CPA: 0

Break-even ROAS: 0

Clicks you can afford per sale at break-even: 0

A store sells a jacket for $120 at a 50% margin. Clicks in this market cost about $2. What do the break-even numbers tell you?

Budget allocation across prospecting, retargeting, and testing

A budget isn't one pile of money; it's three jobs competing for the same dollars. Prospecting finds new customers and does the heavy lifting — on most healthy accounts it takes the majority of spend. Retargeting follows up with people who visited, watched, or abandoned a cart; it converts well but it's capped by the size of the pool you're remarketing to. Testing is the ring-fenced slice that buys information: new angles, new hooks, new offers. A common starting shape is roughly 70–80% prospecting, 10–20% retargeting, and about 10% testing — then you move money based on what your account's numbers actually say, not what a template said.

Each job has a characteristic way of going wrong. Retargeting goes wrong by greed: push budget past what the pool can absorb and you pay to show the same ad to the same two thousand people thirty times each — frequency climbs, CPA quietly rots, and the dashboard still flatters you because these were the warmest audiences. Testing goes wrong by starvation or by chaos: too little spend and nothing reaches a verdict; too many simultaneous tests and nothing does either. Prospecting goes wrong when it's asked to subsidize the other two — its CPA always looks worst because it does the hardest job, and cutting it to make this month's blended numbers prettier shrinks next month's retargeting pool and, soon after, the whole account.

Rebalance on a rhythm — a monthly review against break-even targets, not daily fiddling. When budgets get cut, protect proven prospecting and the core retargeting pool first, and take the money from testing and the weakest tests inside prospecting. When budgets grow, feed the winners before widening anything. Every allocation decision gets one sentence in the client report: what moved, why, and what you expect it to change. That sentence is what separates a buyer from someone who just presses the buttons the platform suggests.

A client cuts their monthly budget by 40% and asks you to keep results "about the same." Where does the cut come from first?

Fee packaging: retainer + percentage + kicker

How you charge shapes how you work, so build your fee the way the market's grown-ups do. The three models: a flat retainer for management ($500–1,000/mo at entry level, $1,000–2,500 mid, $2,000–5,000 for senior freelance specialists); a percentage of ad spend — 10–20% is standard, 15% is common, usually once a client's spend passes roughly $15–25K a month, with a minimum fee underneath it; and a performance kicker, a bonus paid when you beat an agreed target CPA or ROAS. The strongest structure in 2026 is a base retainer plus a kicker: the retainer keeps you paid in slow months, and the kicker pays you for efficiency instead of for spend.

See why pure percentage alone is a trap. A client spending $50K a month at 15% pays you $7,500 a month — real money, about $90K a year from one client. But your income now rises when they spend more, even when the right advice is "spend less this month," and it falls the moment their budget gets cut, through no fault of your work. Every efficiency conversation becomes an argument against your own paycheck. A base retainer removes that conflict, and the kicker replaces it with a better one: you make more when they make more.

Match the package to the account's stage. Below roughly $3,000–5,000 a month in spend, professional management is hard to justify at all — say so, and offer the audit or a setup instead. For growing accounts, quote the flat retainer with the step-up written in: "When spend passes $25K a month for two straight months, we move to $2,500 base plus 10%." Write the kicker target from the break-even math in Lesson 1, not from a number that sounds exciting. A fee agreement both sides can calculate is a fee agreement neither side resents.

Your turn: Build your three-stage fee offer. Write your entry flat retainer for a client spending $5K/mo, the spend level where you'd switch models, and the base-plus-percentage structure above that line. Then add your kicker: the exact CPA or ROAS target (use break-even math from a sample product) and the bonus it pays. Finish with one sentence you'd say out loud explaining why this structure is fair to the client.

A client spends $30K a month and is choosing between your flat $1,500 retainer and 15% of spend. They ask which you'd pick if you were them. What's the honest answer?

What you can now do

Compute break-even CPA and ROAS from the client's price and margin before a dollar spends: an $80 product at 60% margin leaves $48 per customer and needs 1.67 ROAS just to tread water.
Split any budget by job — roughly 70–80% prospecting, 10–20% retargeting, about 10% ring-fenced for testing — then move the money based on what your account's numbers actually say.
Package your fee the grown-up way: a base retainer for management, a percentage of spend once it passes the trigger level with a minimum underneath, and a performance kicker on an exact CPA or ROAS target.