Most brands treat a new-country launch like a settings change. Same creative, same funnel, same budget logic, just a different currency symbol and a translated headline. Then the numbers come in and nothing lines up, and the instinct is to blame the market, the product-market fit, the team. Usually it's simpler than that. The strategy that worked in the first market was built around that market's costs, habits, and trust signals, and none of those travel automatically.
We've run this exact move for a brand expanding from Australia into the US, and the gap between "should work the same" and "actually worked the same" showed up in the first week.
CPM doesn't transfer
Start with the most basic number in the account: what it costs to put an ad in front of someone. Running the same brand, often the same creative, we've seen Meta CPM sit around $12 to $14 in Australia and $25 to $28 in the US. Nearly double, for the identical ad.
If your budget and your first-month expectations were built off the old market's CPM, the new market's math doesn't just get tighter, it breaks. A budget that reached 200,000 people a week in Australia might reach 100,000 in the US at the same spend. If nobody adjusts for that going in, the campaign looks like it's underperforming when really it's just being asked to do twice the job on the same fuel.
This is also where a lot of teams make their first bad call. They see the CPM double, panic, and either pull budget too early or double it without a plan, both of which skip the step that actually matters: figuring out what that CPM difference does to CAC, not just to reach.
CAC tracks CPM, but not 1:1
Here's where it gets more interesting than "the US costs more." Doubling CPM does not mean doubling customer acquisition cost, because conversion rate and average order value move independently, and they can offset the gap or make it worse.
A market with a higher CPM sometimes converts better, because the platform is more mature and the audience is more used to buying through ads. A market with cheaper reach sometimes converts worse, because the same ad dollar is reaching a colder, less bought-in audience. The number that actually matters for a launch decision is CAC, not CPM. CPM tells you what you're paying to be seen. CAC tells you what you're paying to win a customer, and that's the only number that should be steering budget and pricing decisions.
The mistake we see most often: a team plans a new-market launch off the CPM difference alone, assumes CAC will move the same amount, and either overbudgets out of caution or underbudgets out of optimism. Either way, they're planning off the wrong number. The only way to know your real CAC in a new market is to spend enough to see it, which is exactly why the launch checklist further down starts with a deliberately small, cheap test rather than a full-scale rollout.
Price and target CAC to the new market, not the exchange rate
The other place this goes wrong is pricing. It's tempting to take your home-market price, run it through the exchange rate, and call the new market done. That works right up until you look at what it actually costs to acquire a customer there.
If the new market's CAC runs meaningfully higher than the market you're launching from, and your price was just currency-converted, you've built in a margin problem before you've spent a dollar. The fix is to set a target CAC and a required AOV for the new market before you launch, based on what that market actually costs to acquire in, not what your home market taught you to expect. Sometimes that means a higher minimum cart size, a different bundle, or a different price point entirely, even for what is, on paper, the same product.
This is also where a lot of the panic from the CPM jump resolves itself. A brand that sets its US price and bundle strategy around a US-specific target CAC, instead of an AU-converted price, usually finds the "the US is too expensive" problem was actually a pricing problem, not a market problem.
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Cost is the easiest thing to notice because it shows up in the ad account immediately. The rest shows up more slowly, usually as flat performance nobody can quite explain.
Payment friction. How people expect to pay differs by market, and a checkout that felt frictionless at home can quietly lose customers somewhere new if the expected payment options aren't there.
Creative-market fit. The proof points, tone, and pacing that convince a buyer in one country don't automatically convince a buyer in another. A testimonial-heavy ad that performs well in one market can read as generic or even slightly off in another, not because the product is different, but because what builds trust differs.
Trust signals. Reviews, social proof, and brand credibility markers carry different weight depending on how mature the ecommerce market is and how skeptical the audience has learned to be.
Seasonal calendar. The sales moments that matter shift. A calendar built around one country's retail rhythm (EOFY sales, say) is running against the wrong dates in a market where Black Friday is the moment that matters instead.
None of these show up in a CPM report. They show up as "the ads are running fine but nothing's converting," which is a much harder problem to diagnose after the fact than to plan for upfront.
The launch checklist
A simple discipline saves the guesswork later. Before committing real budget to a new country:
- Validate signal cheaply first. A small, deliberately underfunded test tells you more about whether the market wants the product at all than a full-scale launch does, before you're committed to a budget built on assumptions.
- Set a minimum localization bar. Currency, payment methods, and shipping expectations need to be right before spend starts, not fixed reactively once orders stall.
- Set target CAC and required AOV for the new market before spending, based on that market's cost reality, not the old market's habits.
- Choose the right retention channel for that market. What works for repeat purchase in one country (WhatsApp, email, SMS) isn't automatically what works in another.
- Budget for statistical significance in the new market's CPM and CAC reality. A budget sized for the old market's costs won't generate enough data in the new one to actually learn anything.
- Give it a real timeline before judging results. A new market takes longer to read accurately than an established one, because you're building signal from zero, not optimizing an account that already has history.
The point of all this
None of this is a reason not to expand. It's a reason to expand with the new market's numbers, not the old market's habits. We've run this exact sequence moving a brand from Australia into the US, and the difference between the launch that worked and the one that would have burned a quarter's budget figuring this out the hard way was simply doing the CAC math before spending, not after.
FAQ
Is it normal for CPM to be this different between two English-speaking, similarly developed markets like Australia and the US? Yes. CPM is driven by advertiser competition and audience purchasing power in that specific market, not by how culturally similar two countries are. The US has a much larger pool of advertisers bidding for the same attention, which pushes cost up regardless of how alike the markets otherwise look.
Should I wait until I have a big budget to test a new country, or start small? Start small. A deliberately underfunded test is meant to tell you whether there's real demand and what your actual CAC looks like, not to prove the market at scale. Committing a large budget before you know the market's cost reality is how teams end up overspending on assumptions borrowed from the old market.
How long should I run a new-market test before deciding if it's working? Longer than feels comfortable. A new market has no account history, so early data is noisier and slower to stabilize than an established market's. Judging a new country off the first one to two weeks usually means judging it before it's had a fair chance to convert.
Do I need completely different creative for each market, or can I reuse what already works? You can usually reuse the underlying offer and product story, but the specific proof points, tone, and pacing often need adjusting. Treat existing creative as a strong starting draft to test against the new market, not a finished asset to run unchanged.
What's the single biggest mistake brands make expanding into a new country? Currency-converting the home market's price and CAC expectations instead of setting new targets based on the new market's actual costs. That one shortcut is behind most of the "this market doesn't work for us" conclusions that are really pricing problems in disguise.
Not sure what your target CAC should look like in a new market? Talk to us at growth@adtitudemedia.com.