Insights

What is a good MER for a DTC brand?

A good MER is the one that keeps you profitable at your margins while still letting you scale. It is a target you set from your own contribution margin, not a fixed number you copy from someone else's brand.

Matthew Feng · Published 7 August 2026 · 6 min read

What MER actually measures

MER is marketing efficiency ratio. The maths is simple: total revenue divided by total ad spend. If you did $1m in sales and spent $200k across every channel, your MER is 5. For every dollar you put into media, five come back in top-line revenue.

The word that matters is total. MER looks at the whole business, not one campaign. It captures the organic sales your paid media assists, the repeat orders, the halo from brand awareness. It is the number your finance team can actually tie to profit, because it lives at the same level they do.

MER is not ROAS

ROAS is return on ad spend, reported by the platform. Meta tells you a campaign hit a 3x ROAS. The problem is that every platform claims credit for the same sale. Meta counts it, TikTok counts it, Google counts it. Add the platform ROAS figures up and you get a number that says you are wildly profitable while your bank balance says otherwise.

MER cuts through that. It does not care which platform gets the attribution. It asks one honest question: for all the money that left, how much came in. That is why we steer clients off chasing platform ROAS and onto holding a blended MER target.

ROAS tells you what a platform wants you to believe. MER tells you what your bank account already knows.

Set your target from contribution margin

Here is where the "good number" question gets answered properly. Your break-even MER is set by your contribution margin, the percentage of each sale left after cost of goods, shipping, payment fees and returns.

The rule is clean. Break-even MER equals one divided by your contribution margin. If your margin is 50 percent, you break even at a 2x MER. Spend a dollar, you need two back just to cover the product and the media. At 40 percent margin, break-even is 2.5x. At 33 percent, it is roughly 3x.

So your target sits above break-even by however much profit you want to bank. A brand at 50 percent margin that wants healthy profit might run a 3x to 4x MER. A brand with fat 70 percent margins can profitably run far leaner, because break-even lands near 1.4x. This is why a "good" MER for one brand is a disaster for another. The number is downstream of your margins.

Lower MER is not automatically worse

Operators panic when MER drops. Sometimes that panic is wrong. A deliberately lower MER means you are spending harder to acquire customers, which is the right move if your margins and repeat rate support it. The question is never "is my MER high" but "is my MER above the line my margins set, and am I growing".

How creative volume lets you hold MER while scaling

This is the part most brands miss. As you add spend, MER naturally wants to fall. You saturate your best audiences, frequency climbs on your winning ads, and each extra dollar buys a worse impression than the last. Scale and efficiency pull against each other.

Creative volume is what breaks that trade-off. Every fresh, distinct concept you feed the account opens a new pocket of demand the algorithm can go find. More winners in rotation means lower frequency on any single ad, which means you can pour budget in without efficiency collapsing. The account has somewhere new to spend.

Starve the account and the opposite happens. A thin set of ads fatigues, frequency spikes, and MER falls the moment you push spend. You end up capping your own growth to protect the ratio.

What holding MER at scale looks like

We ran this with Copini. As spend climbed, the account held a 10x MER. Ten dollars of revenue for every dollar of media, maintained while scaling, not just at a tiny base. That does not come from a bid tweak. It comes from a steady stream of new angles going into the account so it never runs dry.

The playbook behind it is consistent:

Set the MER target from contribution margin, so profit is baked into the number.
Brief a high volume of distinct concepts, not colour swaps of one static.
Scale spend into the account only as fast as fresh winners let you.
Feed every winning angle back into the next round of briefs so efficiency compounds.

The takeaway

Stop asking what MER is good in the abstract. Work out your contribution margin, set break-even, then decide how much profit you want to sit above it. That is your target. Report blended MER, not platform ROAS, so nobody is fooled by double-counted sales.

Then defend that MER with creative. The brands that hold efficiency while scaling are not the ones with the cleverest bid strategy. They are the ones feeding the account enough new creative to keep finding demand. Your MER target tells you where profit lives. Your creative volume decides whether you can hold it as you grow.