Test-Market a New Country in Google Ads: Budget and Time

A country test in Google Ads has two budget floors. Each product you test needs 15–20 clicks, the minimum in our product study. A campaign of the country’s own needs about 30 conversions a month, the portal’s minimum. Allow at least six weeks, the period Google recommends before comparing a Performance Max campaign’s results. Start on Maximize conversion value without a target ROAS. Scale at 30+ conversions a month with ROAS at or above break-even. Stop once the tested products have had their clicks and the country misses both.

This guide covers the test itself: where each number comes from and how the numbers add up to a budget for your store. It also shows how to write the scale-or-stop rule before the first click. Choosing the country, setting up the feed and running several markets long term belong to the wider topic of international PPC for online stores.

What does “test market” mean for a store already on Google Ads?

In marketing, a test market is a limited launch in one region before a full rollout. It shows whether the full launch would pay off. For an online store that already advertises at home, the products and the campaigns already exist. So the test answers narrower questions:

A classic test market tries to copy the full launch on a small scale. A country test in Google Ads works the same way: same catalogue, same tracking, same bidding logic, a smaller budget and a deadline.

What has to be ready before the first paid click?

Google’s documentation covers most of the setup. Four points can stop a country test before it starts:

1. Products must target the country in Merchant Center. The Merchant API documentation describes two ways: default target countries on the data source, or countries set per product through the shipping attribute (Manage API data sources for product uploads). Without either, the products are not set to show in the new country.
2. Shipping must be set for that country. In a sample of 400,000 products with Merchant Center flags from our data, “no shipping service defined for the country” was the third most common flag. It appeared on 38,032 products. The sample is not random, so read it as a common slip, not a rate. Check shipping for the new country before launch, not after a week of zero impressions.
3. A feed label does not switch the country on. Google’s documentation for retail Performance Max notes that a country code in a feed label doesn’t automatically enable ads to serve there. You have to set location targeting first (Performance Max for online sales with a product feed).
4. Location targeting decides who counts as “the country”. Google’s recommended default, Presence or interest, also reaches people who have shown interest in the location, for example through search terms or past visits (Location targeting). For a clean test, Presence keeps the results to people who are likely to be in the country.

Can free listings test a country before you pay for clicks?

They can show demand, not the economics. Free listings put your products across Google at no cost once the programme is active for the country. Merchant Center tracks the programme per region and marks a region active only once it meets the programme’s requirements (REST Resource: accounts.programs).

The useful part comes from the reports. Merchant Center performance data splits clicks and impressions per product by marketing method, paid ads versus organic (Performance reports). You can also segment it by the country where the customer was at the time of the click (ProductPerformanceView). So before spending anything, you can see which products people in the new country already click on.

The cost per click, your position in the ad auction and the ROAS you will get show up only in the paid test. Use free listings to build the shortlist of products for that test, not as the test itself. If you are still choosing between countries, start by researching an expansion market with your own ad data.

A fair test of one product costs 15 to 50 clicks

In our study of 1.4 million products across 130+ stores over 13 months, the minimum honest test of a product came out at 15–20 clicks. With fewer clicks, zero conversions is noise, not a result. The threshold depends on the category:

At the study’s average cost per click of $0.20, that is $3–10 per product. In a new country your cost per click will differ, so multiply the clicks by your own figure once the first week of data is in. Our guide on how to test products with Google Ads shows how to set and read these thresholds for each product.

The same study shows why a test of the whole catalogue rarely works. In the median store, the top 10% of products took 68.1% of ad spend. If a test budget concentrates the same way, most products never reach their 15–20 clicks. A shortlist is cheaper and gives an answer you can read.

How much budget does a country test need?

Work out two floors and budget for the larger one.

• The click floor = products on the shortlist × test clicks per product × cost per click. It grows with every product you add.
• The conversion floor = 30 conversions a month × expected cost per conversion. It applies if the country gets its own campaign. The portal treats 30 conversions a month per campaign as the minimum and 50+ as comfortable. This floor stays the same however large the catalogue is.

If the country runs inside an existing campaign, the conversion floor applies to that campaign as a whole. What you budget for the country is the click floor.

Example store, not client data.

A tableware shop with 3,000 products pays 5 per click at home, converts 3.75% of clicks and pays about 133 per conversion, at a ROAS of 4.5. It assumes the same cost per click and conversion rate in the new country, and replaces both with real figures after the first two weeks.

Over six weeks, the conversion floor comes to about 5,500 and buys about 1,100 clicks. That covers a shortlist of 50 products with a little room for uneven spend. A shortlist of 300 would need more than five times the money for the same answer. The shop tests 50 products on 4,000 a month for six weeks.

How long should the test run?

At least six weeks. Google recommends letting Performance Max campaigns run for at least 6 weeks before you compare them with existing campaigns. That gives its system time to ramp up and gather data (Compare performance with an existing campaign).

The first days belong to the learning period. Google Ads marks a bid strategy as learning when it is new or recently reactivated, and after a budget or settings change (BiddingStrategySystemStatus). Each mid-test edit can put the campaign back into learning, so keep the budget fixed for the test. If you must change it, the portal’s rule is to move it by up to 20% at a time.

Two numbers from our data explain why one good or bad month proves little:

• Monthly ROAS swings even in established stores. Across 110 stores with 8+ months of data (June 2025 – June 2026), a typical month’s ROAS was a median 16.0% away from the store’s own median. The best month was a median 3.1× the worst.
• Seasonal swings are large. Across 96 stores (July 2025 – June 2026), the three best months brought a median 2.62× the revenue of the three worst. A six-week test that starts in your trough and ends in your peak measures the season, not the country.

A schedule that follows from this:

How does bidding start in a country with no history?

Performance Max has no manual bids: it runs on Smart Bidding, where Google picks the bid in every auction. Google supports two strategies for it, Maximize conversions and Maximize conversion value, each with an optional target (Create a Performance Max campaign). So the question to settle is where the country’s data comes from. There are three ways to start:

For a small store, adding the country to an existing campaign is usually the better start. Below 30 conversions a month, the portal’s Structure section allows one campaign, two at most: after a split, each part gets too few conversions to learn. Our guide to structuring campaigns across countries shows which structure fits several countries once the test is over.

Start without a target ROAS: with no history in the country, any target is a guess. Add one once the country has its own conversion record, at the point described in bidding for a new campaign.

Which result tells you to scale or stop?

Write the rule before launch. It has four parts: the end date, the budget, the shortlist and the ROAS the country has to reach. That last one is your break-even ROAS for the country: 1 ÷ your margin after the country’s own shipping and returns costs. Our data has no margins or returns, so you work this number out yourself.

Example store, not client data. A tableware shop keeps a 35% margin at home. Its break-even ROAS is 1 ÷ 0.35 ≈ 2.86. If shipping to the new country costs more, the margin there is lower and the break-even ROAS higher.

After six weeks, the verdict comes from two readings: conversions a month from the country and its ROAS against break-even.

The thresholds come from the portal’s working rules. Split a campaign only when both resulting campaigns would get at least 30 conversions a month. Move a target ROAS by up to 15% at a time, no more often than once every one to two weeks. Exclude a product after 50 or more clicks and no conversion in 360 days. That last rule is for later clean-up: few products reach it inside a six-week test.

Scaling goes together with dearer clicks. Our data covers 1,360 store-months (June 2025 – June 2026). In the 155 months when a store raised its spend by more than 70%, compared with all stores in the same month, median revenue rose 129.9% and cost per click 9.2%. ROAS fell by no more than 5% in 61% of those months, about the same share as in months when spend stayed flat (59%).

These are whole stores, not country tests, and the data is an observation, not an experiment. It still shows what to expect: the auction gets dearer, and in about four months out of ten ROAS slips. Once you run several countries, budgets and ROAS targets per country shows how to split the budget and set targets.

Your country test in eight steps

1. Turn on free listings for the country and let them collect organic clicks before you pay for any. This gives you the shortlist.
2. Check shipping, data source countries and the feed label. Each of them can stop products from serving in the new country.
3. Set location targeting to Presence. The default also reaches people who have only shown interest in the country.
4. Pick a shortlist of products that drew organic clicks or sell best at home. Fewer products reach their test clicks sooner.
5. Work out both budget floors and take the larger one. Use your home cost per click and conversion rate until the country has its own.
6. Write the rule: end date, budget, shortlist, break-even ROAS for the country.
7. Launch on Maximize conversion value without a target ROAS and leave budget and settings alone for six weeks.
8. Apply the rule after week six, then recalculate both floors with the country’s real numbers before you scale.

The portal’s Structure section counts how many conversions a month your product campaigns bring and says how many campaigns that is enough for. It also shows which rung your account is on: 30 a month opens the rung where splitting is allowed. The portal’s change log gives a first conclusion on a change after 7 days, marked preliminary, and a confident one after 14. When a change is less than a week old, it says it is too early to judge.

How many ad campaigns your shop can carry. The portal counts how many conversions your ads bring, says how many campaigns that is enough for, and goes through each of the ones already running. The portal changes nothing without your consent.

Analyse your campaigns →

Frequently asked questions

Can I test two countries at once?

Yes, but each country needs its own budget floors, so the budget doubles. If both share one campaign, the stronger country can take most of the spend, and the weaker one may never get its test clicks. Testing one country at a time keeps the answer readable.

What if clicks in the new country cost much more than at home?

After the first two weeks, recalculate both budget floors with the real figures. The click floor rises in proportion to the cost per click. The conversion floor depends on cost per click divided by conversion rate. A higher cost per click with a higher conversion rate can leave the cost per conversion unchanged.

Sources

• Compare performance with an existing campaign — Google Ads API documentation: allow at least 6 weeks for Performance Max campaigns to run before comparing performance. Checked 2 October 2026.
• BiddingStrategySystemStatus — Google Ads API reference: a bid strategy is learning when recently created or reactivated, after a budget change and after a setting change. Checked 2 October 2026.
• Create a Performance Max campaign — Google Ads API documentation: Maximize conversions and Maximize conversion value, each with an optional target, are the only supported strategies. Checked 2 October 2026.
• Performance Max for online sales with a product feed (retail) — Google Ads API documentation: a country code in a feed label doesn’t enable ads to serve in that country without location targeting. Checked 2 October 2026.
• Location targeting — Google Ads API documentation: Presence or interest is the recommended default and also reaches people interested in the location; Presence reaches people likely to be there. Checked 2 October 2026.
• Manage API data sources for product uploads — Merchant API documentation: target countries set on the data source or per product through the shipping attribute. Checked 2 October 2026.
• REST Resource: accounts.programs — Merchant API reference: free product listings show products across Google for free; a region is active once its requirements are met. Checked 2 October 2026.
• Performance reports — Merchant API documentation: clicks and impressions per product, split by marketing method (ads or organic). Checked 2 October 2026.
• ProductPerformanceView — Merchant API reference: performance segmented by the country where the customer was at the time of the event. Checked 2 October 2026.
• GetProfit study of 1,404,808 products, 130+ stores, 13 months — minimum test clicks by category; average cost per click; share of spend taken by the top 10% of products.
• GetProfit data: sample of 400,000 products with Merchant Center flags — most common flags, including no shipping service defined for a country.
• GetProfit data: 110 stores with 8+ months, June 2025 – June 2026 — month-to-month ROAS swings.
• GetProfit data: 96 stores, July 2025 – June 2026 — revenue of the three best months against the three worst.
• GetProfit data: 1,360 store-months, June 2025 – June 2026 — revenue, cost per click and ROAS in months when spend rose by more than 70% against all stores in the same month.
• GetProfit portal methodology — 30 conversions a month per campaign as the minimum and 50+ as comfortable; split only when both parts reach 30; budget steps of up to 20% and target steps of up to 15%; exclusion after 50+ clicks with no conversion in 360 days; change verdicts after 7 and 14 days.