How we pace ad budgets to hit spend and ROAS targets every month
In short: Set a budget and a ROAS target at the start of the month, then forecast both several times a week. Each forecast lands in one of three scenarios, and each scenario has one move: spend more, ask for more budget, or move money to the channels that are working.
Most brands set a monthly ad budget and a return target, then look at both again at the end of the month, when it's too late to change either. We manage them the other way round: proactively, from forecasts, throughout the month.
At the start of each month: set the targets
- Set the budget and the ROAS target. Start from what the brand needs this month and from last year's results for the same period, so seasonality is built in.
- Decide how the budget splits across channels (for example Meta, Google and TikTok), based on where returns and growth potential are highest.
Every week: forecast, don't just report
Review the forecast for month-end spend and ROAS, not just the month-to-date numbers. For accounts with larger budgets we do this two or three times a week. Then share the update with everyone who owns the budget, so a decision never waits for the next meeting.
The three scenarios
Every forecast lands in one of three scenarios, and each has one action.
| Forecast | What it means | What we do |
|---|---|---|
| ROAS at or above target, underspending | There's profitable demand we're not buying | Increase spend to reach the budget |
| ROAS at or above target, overspending | Returns are strong enough to justify more | Send the forecast to the budget owner and ask for extra budget |
| ROAS below target | Some spend isn't earning its keep | Move budget to the channels with higher ROAS or more room to grow |
When you need to spend less: cut bids, not budgets
Whether ROAS is below target or the budget has been cut, the instinct is to lower daily budgets. We lower bids instead. Lower bids buy cheaper traffic: ads show a little less often but keep getting clicks all day, and total cost falls.
Cutting the daily budget does the opposite. Campaigns hit the cap and stop serving once it's spent, often missing the busiest hours of the day.
Other levers that reduce spend without switching ads off:
- Bid down on audiences, devices, locations or hours that convert worse (check your analytics first).
- Target where people actually are, rather than people "interested in" a location.
- Narrow language targeting to the languages you sell in.
- On display campaigns, cap how often the same person sees your ads, and review which placements you're showing on.
- Shorten remarketing windows or split remarketing lists by product category, keeping at least a few hundred people in each list.
How you know it's working
By the last week of the month there should be no surprises: spend is on track to land on budget, and any shortfall on ROAS was flagged, with a reason and a plan, weeks earlier.