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Is it better to create a new pmax campaign with big budget or just increase budget of existing pmax campaign
Posted by on May 8, 2026 at 6:41 amHi there. Not sure if this has been answered already but I run ads for an online retailer. For an upcoming anniversary campaign manager has given me 4x our monthly budget to spend on for the campaign to run for a month.
I currently run pmax campaigns for BAU that with tROAS. Will it be better just increasing the budget for my existing pmax campaign or will it be better to create a new one?
Budget reverts to original lower rate once anniversary is done. Advice is highly appreciated. Thank you!
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1 Reply
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I would do a complete audit of the underperforming PMAX. Maybe switch out the YT videos and display ads, etc…
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I would usually scale the existing one if it already has clean conversion data and stable ROAS. A new PMax can make sense if the anniversary promo has different products, assets, margin, or conversion expectations. Just avoid shocking the budget too hard overnight.
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I’d probably avoid rebuilding from scratch if the current PMax already has solid learning/history. Usually safer to gradually scale the existing campaign and maybe support it with a separate campaign for anniversary specific creatives/offers if needed, instead of resetting everything.
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increasing the budget on the existing campaign is usually the better call. a new pmax starts with zero signals and will spend the first week or two just learning, which is wasted time on a short burst budget. your existing campaign already knows what converts, so give it more fuel rather than starting from scratch.
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