Pricing & MetricsMarketing Operations

What Is POAS (Profit on Ad Spend)?

First published Oct 13, 2026Updated October 13, 2026

Valentin Radu

Founder & CEO, Omniconvert

Published: Oct 13, 2026Updated: Oct 13, 2026

Reviewed by Cristina Stefanova, Head of Content

A single plain kraft shipping carton on a pale seamless studio floor in hard clean light, with a slim brushed-aluminium spec plate beside it engraved with three lines: profit before ads 40, ad spend 20, POAS 2.0

Quick Answer

POAS, or profit on ad spend, is the profit an order earns before advertising, divided by the advertising spend that won it. The formula is order value after discounts, minus every variable cost except ads, divided by ad spend. A POAS of 1.0 is break-even, and anything above it is profit left after the ads are paid for. The cost side decides whether the number can be trusted: count cost of goods, payment fees, fulfilment, shipping you pay and a returns provision, and leave out fixed overheads. A good POAS has no universal value. It sits above 1.0 by enough to cover your overheads and risk, and your contribution margin sets how much ad spend that allows. A spreadsheet, a BI model or a profit-analytics tool can calculate it.

Key Takeaways

POAS is defined as profit before ad spend divided by ad spend, and 1.0 is the break-even point.
The numerator is order value after discounts minus every variable cost except advertising, not revenue and not gross margin alone.
A POAS built on cost of goods only looks healthy while shipping, payment fees and returns erase the profit.
There is no universal good POAS: the target follows from your contribution margin, your overheads and the customers you are buying.
Fixed overheads stay outside the calculation, so a target of exactly 1.0 leaves them unpaid.
Software can calculate POAS only if cost data sits in the same place as ad data.

Last updated: October 2026

What is POAS? Profit on ad spend (POAS) tells you how much profit each unit of ad spend brings back, counted before the ad cost comes off. At a POAS of 2.0, every dollar you spend returns two dollars of profit before that spend, so the ad paid for itself and left one dollar over.

I have spent 13 years in eCommerce, and one mistake keeps returning: a campaign that looks healthy in revenue and loses money once costs are counted. POAS catches that. Nexus by Omniconvert is the AI eCommerce growth engine for Shopify brands: it reads your store, ad and customer data, ranks growth opportunities by profit impact, and builds the campaigns to act on them, and you approve what goes live.

This page covers the definition and the arithmetic. For the wider picture, read what True Profit means in eCommerce and what ROAS is. For actions after a weak number, see how to reduce wasted ad spend.

What is POAS (profit on ad spend)?

POAS, or profit on ad spend, is the profit a campaign earns before its own cost, divided by that cost. A POAS of 1.0 is break-even. Above 1.0, profit remains after the ad bill. Below 1.0, the campaign lost money.

POAS is defined as profit before ad spend divided by ad spend. Profit before ad spend is defined as order value after discounts, minus every variable cost of winning and fulfilling the order except advertising. Some tools call it gross profit, others contribution margin before ads. For the full argument about which metric to steer by, see ROAS, True Profit and contribution margin.

How to calculate POAS

Subtract every variable cost except advertising from order value after discounts. Divide that profit by the ad spend that won the order. In the example below, 40 of profit on 20 of spend gives a POAS of 2.0.

The formula is POAS = (order value after discounts minus variable costs excluding ads) divided by ad spend. Here it is for one hypothetical order.

Source: Omniconvert, hypothetical example per 100 of order value, built to show the arithmetic. It is not benchmark data.
Line	Per 100 of order value	Note
Order value after discounts	100	Money you actually received
Cost of goods	-40	What the product cost you
Payment fees	-3	Charged on the order
Fulfilment and shipping paid	-12	Pick, pack and carrier
Returns provision	-5	Expected cost of returns
Profit before ad spend	40	The numerator
Ad spend	20	The denominator
POAS	2.0	40 divided by 20

Every figure above is invented for the example. Replace each line with your own costs.

Which costs come before ad spend?

Count every cost that changes when you win one more order: cost of goods, payment fees, fulfilment, shipping you pay, and a returns provision. Leave out rent, salaries and software. Ad spend stays out of the numerator because it is the denominator.

Use the price after discounts. Shipping the customer pays is revenue, and shipping you pay is cost. Where each number lives is covered in how to measure True Profit.

What is a good POAS target?

Break-even POAS is 1.0, and a good target sits above it by enough to cover your overheads and risk. No universal figure exists: it follows from your contribution margin, your overheads and whether you are buying a customer or a single sale.

At break-even your overheads are still unpaid. Margin sets the room you have. Two hypothetical stores both run a revenue return of 5.0. One keeps 40 per 100 of order value before ads, the other 20. Their POAS is 2.0 and 1.0: one has room, the other is at break-even.

Customer type moves the target. A campaign that wins new customers can accept a POAS below 1.0 if repeat orders repay it, but only when you measure them as a cohort with a stated payback window. I quote no industry POAS, because another store's margin says nothing about yours. Whatever target you set, test that a change moved it. A structured testing programme separates a real gain from noise.

AliveCor used Omniconvert to run a structured A/B testing programme and achieved +21% conversion rate, +5% revenue per visitor, and 94% statistical relevance across their experiments. [Omniconvert, AliveCor case study]

POAS in eCommerce: where the number goes wrong

The usual failure is a numerator that is too generous. Teams use the margin the store already holds, order value minus cost of goods, so POAS looks healthy while shipping, fees and returns erase the profit. Fix the cost lines first.

A team wants POAS fast, so it takes the product margin from the store admin and divides by ad spend. The ratio looks comfortable and the campaign gets more budget. Every input is a real field. But shipping paid, payment fees and returns were never subtracted, so the true ratio is lower, sometimes under 1.0. The cost is concrete: the team scales ads that lose money on each order, and the dashboard stays green. Across 7,000+ websites in 15+ industries, audited against 248+ criteria [CROBenchmark Report 2026, Omniconvert], measurement gaps like this recur more often than missing tools.

Software to calculate POAS

Three kinds of software can calculate POAS: a spreadsheet fed by exports, a BI model joined to your cost data, and a profit-analytics or growth tool that already holds orders, costs and ad spend together. Cost data next to ad data decides it.

A spreadsheet is the right first step, because it forces you to list the cost lines. It breaks when costs vary by product and month. A BI model scales but needs an analyst. Some teams send profit to the ad platform as the conversion value, so it optimises on profit. That works only if each order's profit is accurate when sent.

Nexus goes one step further. It unifies store, ad and customer data and measures results in True Profit, not ROAS, per ad, with live Meta and Google integrations reconciled daily. True Profit is what remains after ad cost, so POAS follows: POAS equals 1 plus True Profit divided by ad spend, when ad spend is the only marketing cost attached.

POAS: FAQs

What does POAS stand for?

POAS stands for profit on ad spend. It divides the profit an order earns before advertising by the ad spend that won it. A POAS of 1.0 is break-even, and anything above it is profit left after the ads are paid for.

How do you calculate POAS?

Take order value after discounts, subtract every variable cost except ads, and divide by ad spend. In the hypothetical example on this page, 40 of profit before ads on 20 of ad spend gives a POAS of 2.0.

What software can calculate POAS?

Start with a spreadsheet. Beyond that, use a BI model joined to your cost data, or a profit-analytics tool that already holds orders, costs and ad spend together.

What is a good POAS?

Above 1.0, which is break-even, by enough to cover your overheads and risk. Your contribution margin sets how much ad spend that takes, so no single figure fits every store.

How does Nexus by Omniconvert relate to POAS?

Nexus by Omniconvert measures results per ad in True Profit, not ROAS, and POAS follows from that figure. It recommends scale, hold, reduce or kill on each ad, and you approve what goes live.

What to do with POAS

POAS is small arithmetic that works only when the profit line is honest. Put every variable cost into profit before ad spend, compute the ratio per campaign, and set a target above 1.0 that your margin justifies. Then act: cut what sits below break-even, and keep a written hypothesis for anything you scale.