Guide · Updated
Can I trust my Facebook ads ROAS?
Short answer
Trust it as Meta's estimate, not as your revenue. Ads Manager credits a sale to the last ad clicked, or viewed if there was no click, within your attribution setting (7-day click or 1-day view by default). It reports the sale on the day the ad was shown and fills gaps with modeled conversions.
Reported ROAS is Meta's account of which sales its ads earned, not a reading of your bank balance, and it can differ from your store for ordinary reasons: the attribution setting, the day a sale is reported on, and modeled conversions. This guide groups our answers by the question that usually comes next: why ROAS dropped, why Meta counts more sales than your store, which setting to use, whether the sales are incremental, what ROAS you need to break even, and why clicks are not turning into sales. For a defensible way to compare your numbers, see Meta ads benchmarks.
Start here
- Meta ads ROAS dropped suddenly: what should I check first?
A decision tree that rules out attribution, data lag, modeling noise and broken tracking first.
- Why does Meta show more purchases than Shopify?
Why Meta's purchase count can run above Shopify's, from duplicate events to view-through and refunds, with a fix.
- Why do Meta and GA4 report different numbers?
A UTM scheme and a three-way comparison for reconciling Meta, GA4 and store revenue.
Why did my ROAS drop suddenly?
- Why did my Facebook ads stop converting?
Eight checks for ads that stopped converting, starting with whether sales or only the tracking stopped.
- What should I check when Meta ads ROAS drops overnight?
A fixed order of checks for an overnight drop: billing, delivery, disapprovals, signal, then learning.
- My platform ROAS collapsed but MER held, what happened?
What it means when platform ROAS falls but MER holds, and how to find the tracking gap.
- How do I triage a sudden Meta ads performance change?
A triage tree for sudden changes across tracking, delivery, auction, season and your own edits.
- Why has my Meta ads revenue plateaued?
How to rank the likely causes when Meta revenue stops growing.
- How do I fix low ROAS on Meta ads?
A layered audit for low ROAS, and the fixes that move it.
Why does Meta report more sales than my store?
- Why does Meta revenue never match my store revenue?
Every source of divergence between Meta and store revenue, and what size of gap is normal.
- Why do Meta and my store report different purchase counts?
How time zones and day boundaries make Meta and your store disagree at the edges.
- Why does Meta report sales my bank account does not show?
Why Ads Manager can show sales your bank account doesn't, and what multi-touch attribution changes.
- How much of my Meta ROAS is estimated rather than observed?
How to estimate how much of your reported ROAS is modeled rather than observed.
- Should I trust Meta modeled conversions?
How to treat modeled conversions as directional and check them against MER and bank revenue.
Which attribution setting should I use?
- What is the default attribution setting for Meta ads?
The attribution windows Meta documents, the default, and why Commerce Manager reports differently.
- Which Meta attribution window should I use?
A matrix of the attribution windows you can select, and what each one credits.
- What is the difference between reporting and optimisation windows?
Why the window you report in and the window Meta optimizes for are separate settings.
Are my Facebook sales incremental?
- What is the difference between attribution and incrementality?
How attribution, MMM, holdouts and geo tests differ in what they can prove.
- Is blended ROAS the same as incrementality?
Why blended ROAS measures efficiency, not cause, and how to read incrementality instead.
- Is Meta Conversion Lift a reliable incrementality test?
What a Meta Conversion Lift test proves, and what it leaves out.
- How much do Advantage+ sales campaigns improve performance?
How to read Meta's published Advantage+ improvement figure, footnote included.
- How can I test incrementality without buying a tool?
A do-it-yourself incrementality test that scales budget down against a clean baseline.
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- How do I run a geo holdout test on a small budget?
A step-by-step geo holdout test with two matched regions and a spreadsheet.
- Is my retargeting campaign actually incremental?
How to test whether high-ROAS retargeting creates sales or takes credit for them.
- Why do my lift tests show results I cannot reproduce?
Controlling seasonality, promotions, returns and stockouts before trusting a lift test.
- Which attribution method is most accurate?
Where MMM, multi-touch attribution and incrementality tests each stop being reliable.
- Which measurement number should I actually trust?
How to combine platform data, store numbers, MMM and lift tests into one view.
- How do I rebuild attribution without cookies?
A layered measurement stack: server-side events, modeled conversions, MER and incrementality.
What ROAS do I need to break even?
- How do I calculate my break-even ROAS?
How to strip every variable cost from an order and turn the margin into a break-even ROAS.
- What ROAS should I target for my business?
How your margin sets the floor under your ROAS target, with a margin-to-target table.
- What is a good ROAS for a D2C e-commerce brand on Meta?
Why a good ROAS depends on category and market, with benchmark tables to compare against.
- What costs am I missing from my break-even ROAS?
The fulfillment, packaging and returns costs that raise your real break-even ROAS.
- How does a discount code change my break-even ROAS?
How a discount code raises the ROAS you need to break even, and how to recompute it.
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- Do payment processing fees change my break-even ROAS?
How processor fees, refunds and chargebacks shift your break-even ROAS.
- How do returns affect my true ROAS?
How to compute a net ROAS that accounts for refunds and reverse logistics.
- When is it acceptable to lose money on the first order?
When losing money on the first order is a sound bet on repeat purchases, and when it isn't.
- Should I scale Meta ads on ROAS or contribution margin?
Why contribution margin, not ROAS, should decide when to scale.
- Where does the money go on a single ecommerce order?
A single $100 order walked down to contribution margin, line by line.
Should I judge Facebook ads on ROAS, MER or profit?
- Should I use ROAS, MER, or contribution margin?
A decision matrix for when to use ROAS, MER or contribution margin.
- Why does a 4x ROAS still lose money?
A worked example of a 4x platform ROAS that still loses money.
- Why does my revenue stay flat when I increase ad spend?
How acquisition MER shows when more spend stops buying new revenue.
- What metrics should I track besides platform ROAS?
Five profit metrics to track alongside platform ROAS.
- How do I measure whether ads bring new customers?
How to separate new-customer ROAS and cost per new customer from repeat revenue.
- How do I calculate blended CAC across channels?
How to calculate blended CAC across Meta, search and marketplaces without double counting.
- How do I compare Meta against my other paid channels?
A contribution-based way to compare Meta with your other paid channels.
Why do I get clicks but no sales?
- Why do my Meta ads get clicks but no sales?
Eleven landing-page mistakes that lose paid visitors, each with its fix.
- Why is my CTR fine but my conversion rate collapsed?
The four places a conversion fault can sit after the click, and the order to check them.
- Why is my cost per add-to-cart stable but cost per purchase doubling?
How to find the checkout step that leaks when cost per purchase rises but add-to-cart costs hold.
- What does a cold visitor from Meta ads need to see first?
What a cold visitor from an ad needs to see first on your product page.
- What should I check on a landing page for paid social?
An ad-to-page continuity audit for paid social landing pages.
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- Should Meta ads go to a landing page or product page?
When to send ad traffic to a landing page, a product page or a collection.
- What trust signals should a D2C landing page have?
Trust signals for the landing pages cold paid traffic lands on, and where to place them.
- Does page speed affect Meta ads performance?
How slow loading and layout shift cut conversion on paid traffic, and what to fix first.
- How do I find checkout friction from paid social traffic?
How to measure each checkout step from cart to thank-you and test one leak at a time.
- How do I reduce mobile checkout friction for a D2C store?
Fixes for mobile checkout friction, including payment methods and trust at checkout.
Do I need a separate attribution tool?
Bach.ai, which is our product, appears in these comparisons.
- What are the best Triple Whale alternatives in 2026?
Alternatives to Triple Whale, matched to the reason you're leaving.
- What are the best Northbeam alternatives for D2C attribution?
When Northbeam pays for itself, and what to buy below that line.
- What are the best Hyros alternatives for attribution in 2026?
When Hyros is more attribution than a Meta-led funnel needs, and the alternatives.
Sources: How conversions are attributed in Commerce Manager (Ads Manager defaults and reporting date), About Meta's modeled conversions, Compare attribution settings in Meta Ads Manager (checked 1 October 2026).
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