
On 24 September 2026 Google Ads added two budget allocation modes to a tool called Recommended Investment Strategy. It works at account level: it reads your performance history, finds campaigns that could absorb more money, and shows a 7-day forecast of what extra spend would do to your clicks, conversions or conversion value. You enter either an additional weekly spend, or a target increase in a metric, and it fills in the rest.
The difference between the two modes looks technical but carries the whole point:
| Mode | What it does | Net effect on budget |
|---|---|---|
| Holistic | Reallocates budget from underused or less efficient campaigns to top performers, and adds new weekly spend. | Higher |
| Growth | “Strictly adds new budget to constrained campaigns… without any reduction on any of your existing campaigns.” | Higher |
Growth mode strictly adds new budget to constrained campaigns that can drive more results, without any reduction on any of your existing campaigns’ budgets.
Notice what’s missing from the menu: a mode that tells you to spend less. The tool also only appears when Google judges that a campaign is budget-constrained or could win more conversions at a favourable cost. It surfaces precisely when it wants you to add.
Here is the mechanism that early users miss. The forecast assumes your cost per conversion stays flat as you pour in more money. It usually doesn’t, and the reason is simple economics.
You buy your cheapest, most ready-to-convert customers first, because they are actively searching for what you sell. When you add budget, those people are already spoken for. The system has to reach people further from a purchase, or bid into more expensive auctions. The first few thousand crowns buy cheap customers. The next buy dearer ones. A smoothly rising forecast curve never shows that.
At home, you have instinct. You roughly know what a customer is worth, what a normal cost per lead looks like, and when a channel is running out of road. In a market you just entered, you have none of that yet, and the forecast fills the vacuum with a confident-looking graph.
That is the trap. A foreign brand launching in the Czech Republic is the exact profile Google’s tool loves: a fresh account with constrained early campaigns and “room to grow.” Scale too fast on the forecast’s word and you can spend your launch budget buying expensive, low-intent customers before you have even learned what a good Czech customer costs. The Czech market is smaller than Western Europe, so the pool of cheap, high-intent searches empties faster, and the marginal cost climbs sooner than you expect.
In your home market you feel when scaling stops paying. In a new one you have to measure it, because the forecast will always tell you to keep going.
An account-level tool, updated with new modes on 24 September 2026, that reads your performance history and recommends how much more to spend, showing an estimated 7-day impact on clicks, conversions or conversion value. You enter extra weekly spend or a target metric increase, and it forecasts the result. It only appears when Google judges a campaign is budget-constrained or could win more conversions at a favourable cost.
Holistic reallocates budget from weaker campaigns to your best ones and adds new weekly spend. Growth only adds budget to constrained campaigns and cuts nothing. Both raise total spend; neither is a mode for spending less.
Treat it as a hypothesis, not an order. It usefully shows which campaigns are constrained and how steep the performance curve is. Its weakness is assuming your cost per conversion holds as you scale, which rarely happens. Decide on marginal cost per customer and real revenue in your own system, not the forecast.
Because you don’t yet know what a customer is worth or what a normal cost looks like locally, so you can’t sanity-check the forecast by instinct. The Czech market is also smaller, so cheap high-intent demand empties faster and marginal cost rises sooner. Measure before you scale.
We help foreign brands read the numbers behind Google’s “spend more” nudge, compute marginal cost per customer, and scale only where it still pays — from Prague, in native Czech.
Talk to our Prague team