If your ads are missing searches because your money runs out each day, it’s natural to wonder whether you should increase your Google Ads budget. A bigger budget can bring in more leads or sales, but whether it’s a safe move depends on how your campaign is set up to bid.

What Search lost impression share (budget) tells you

Inside Google Ads there’s a column called Search lost impression share (budget), which you can add to your campaign view. In plain terms, it tells you how often your ad could have shown to someone searching, but didn’t, because your daily budget had already run out. If it says 30%, you missed roughly three in every ten chances to appear. You can read more in Google’s guide to impression share data.

It’s tempting to read that number as a simple instruction to spend more. Sometimes that’s the right call, but the column doesn’t tell the whole story on its own.

When a bigger Google Ads budget is a fairly safe move

If your campaign uses a target bid strategy, such as Target CPA or Target ROAS, this column is a really useful guide. Google is already working within the limit you’ve given it, so a bigger budget usually means more leads or sales at roughly the same cost. For example, if you’re paying $30 a lead today, you can reasonably expect it to stay close to that as your volume grows.

When extra budget can cost you more

Maximise Conversions and Maximise Conversion Value work differently because they have no target to hold costs in place. Google aims to spend your whole budget, and it picks the best opportunities first. Any extra money then goes to the next best opportunities, which tend to be less likely to buy or enquire. As a result, you’ll probably get more leads or sales, but each one can cost more.

Check your bidding before you spend more

Before you change your Google Ads budget, check how your campaign is bidding. With a target in place, an increase is a fairly safe way to grow. Without one, raise it gradually, treat it as a test, and keep a close eye on what each lead or sale is costing you.

If you’d like to learn how to make decisions like this in your own account, join the waitlist for Profitable Promotion, our Google Ads course.