How to scale your Meta Ads: The difference between horizontal and vertical scaling

So you've got your Meta ads to the point where you're making consistent, profitable sales and you want to grow. What do you do next?

Scaling is one of the most difficult aspects of Meta advertising, and there are plenty of gurus out there swearing by 10% rules and strict every-two-days schedules. But if you've ever actually tried to scale your ads, you'll know it's never quite that simple.

So what are horizontal and vertical scaling, and which is best for your business?

Vertical Scaling

Vertical scaling is what most people think of when talking about scaling Meta ads. It's when you increase the budget on an already successful campaign or ad set, and yes, this is where all those "increase slowly every few days" rules come into play.

This tends to work best with larger budgets, generally ad accounts spending at least $1,000 a day, though it can work on smaller budgets too.

How do you do it? Find an ad, ad set, or campaign that's working and increase the budget. There are plenty of opinions on how much and how often, from 10% per day to 50% every two or three days. My take: increase by what you have available to test. Meta's learning phase can reset with budget changes regardless of the amount, so focus less on the specific increment and more on whether you have the budget to support the test properly.

Things to keep in mind with vertical scaling:

• Don't expect identical results. You might get close, but scaling often comes with a higher cost per purchase. The goal is to increase your economies of scale and make more money overall, even if your CPP nudges up.

• It takes time to readjust. Scaling an existing campaign or ad set can disrupt good performance while the algorithm recalibrates.

• It works best when you have healthy margins, so you can absorb those higher costs per purchase.

• You'll still need to keep testing. There's no permanent winner. You'll need to consistently find new audiences and fresh creative, just at higher spend, which does mean faster results.

• Each audience has a budget ceiling, which becomes more of a problem in smaller or more niche markets.

• You'll burn through creative faster. If you were refreshing assets every few weeks, expect to do it weekly or more frequently as spend increases.

Horizontal Scaling

Horizontal scaling is my personal favourite, especially for small to medium businesses. It takes out most of the risk while delivering the same growth benefits.

The easiest way to explain it is with an example. Say you have a lookalike audience based on 30-day purchasers that's performing really well. Rather than increasing that budget and risking disrupting what's working, you duplicate it and test variations: a broader lookalike percentage, a longer purchase window, or a similar interest-based grouping. The idea is twofold: you're testing whether a new audience can perform even better, and if both audiences end up working, you've effectively scaled.

The big benefit here is that you're not touching what's already working.

Things to keep in mind with horizontal scaling:

• It can be slower than vertical scaling if you keep ad set budgets the same.

• You can speed it up by increasing the budget on new ad sets as you create them, which is essentially a hybrid of both methods, but without the same risk as pure vertical scaling.

• If you're in a niche market without a lot of targeting options, you can run out of room to move horizontally fairly quickly. In that case, make sure you're maxing out your lookalike audiences before you hit a wall.

So which is best for your business?

My preference is horizontal scaling as the safer, more sustainable option. But there comes a point where you simply need to spend more. A combination of both approaches tends to work best: increase budgets gradually where performance supports it, keep expanding horizontally where you can, and keep a close eye on results throughout.

Happy scaling!