A quarterly Microsoft Ads benchmarking checklist

Most Microsoft accounts are not badly managed so much as quietly un-watched. The structure was set up well, the import ran, and then attention drifted back to the larger Google line while Microsoft ticked along unexamined. Benchmarking is the discipline that stops that drift. Done once a quarter, on metrics that mean the same thing on both platforms, it turns a channel you assume is fine into one you can actually defend. Here is a checklist you can repeat.

Metrics that matter

Benchmarking goes wrong when you measure everything and conclude nothing. Pick the metrics that carry decisions and ignore the vanity around them.

Start with the efficiency metrics that connect spend to outcomes: cost per acquisition, return on ad spend, and conversion rate, segmented by campaign type rather than rolled into a single account number. A blended account figure hides the campaigns that are carrying the ones that are leaking. Then the cost inputs: average CPC and impression share, because together they tell you whether a change in results came from price, from availability, or from your own bidding.

Add the quality signals that predict future cost: click-through rate and the platform’s quality signals, which move before your CPCs do and give you early warning. And keep one eye on volume against ceiling, meaning impression share lost to budget versus rank, because Microsoft’s lighter competition means you often have more headroom than you are using, and the data will tell you if you are leaving it on the table.

What to leave out: raw impressions, raw clicks, and anything that goes up simply because you spent more. They feel like progress and measure nothing about quality. The point of a benchmark is to compare like with like over time, so every metric on your list should be a ratio or a rate, not a total.

Like-for-like vs Google

The single most common benchmarking mistake is holding Microsoft to Google’s numbers. It guarantees a wrong conclusion, because the two platforms are not selling you the same thing.

Microsoft Ads typically runs at materially lower CPCs than Google, commonly cited at around 33% lower on average. If you benchmark Microsoft’s CPC against Google’s and call it a win, you have learned nothing you did not already know, and you have hidden the question that matters: is Microsoft’s CPC good or bad relative to Microsoft? The right comparison for an absolute metric is almost always the same platform a quarter ago, not the other platform today.

Like-for-like comparison across platforms is for the metrics that should travel: conversion rate by intent, CPA against the same target, ROAS against the same margin. Those are legitimately comparable, because they are defined by your business rather than by the auction. When you run them side by side, you are asking the only cross-platform question worth asking, which is where the next pound earns the most incremental return.

The audience composition is part of why the comparison needs care. A meaningful share of Microsoft’s audience is higher-income and desktop-dominant; in the US, around 41% of Bing users earn over $100k. A different audience, reached at a different price, should be measured against its own targets and then compared on outcomes, not on inputs. We make the full case for why the platforms need separate yardsticks in Microsoft Ads vs Google Ads in 2026.

Spotting drift

Drift is what benchmarking is really for. It is the slow, undramatic decay that no single week flags but a quarter-over-quarter view makes obvious.

The patterns to watch for are specific. CPCs creeping up while impression share holds flat usually means more competition has entered your auctions, and your bids are now buying less. Conversion rate sliding while click-through rate holds often points at a landing-page or tracking problem rather than a media one. Impression share lost to budget climbing means you are capping a channel that still has profitable headroom, which on Microsoft is a more common waste than overspending. And a quality-signal decline is the earliest warning of all, because it precedes the CPC rise it will eventually cause.

The discipline is to compare each metric against its own trailing baseline, not against a target you set once and forgot. A CPA that is “on target” can still be drifting in the wrong direction inside that target, and the quarter you notice is usually the quarter after it would have been cheap to fix. Tracking integrity belongs on the drift list too: a conversion tag that silently breaks looks exactly like a performance collapse, and the only way to tell them apart quickly is to have been watching the trend.

The reason drift hides on Microsoft specifically is attention, not difficulty. Because it is the smaller line, it gets the smaller share of eyes, and small problems compound unwatched. A quarterly pass is the cheapest insurance against that.

The quarterly cadence

Quarterly is the right rhythm for benchmarking, and it is worth being clear about why, because teams default to either too often or never. Weekly benchmarking drowns signal in noise and tempts you to react to variance that means nothing. Annual is too slow to catch drift before it costs real money. A quarter is long enough for trends to be real and short enough to act on them.

Run the pass the same way every time, because a benchmark is only useful if it is comparable across quarters. Pull the same metrics, over the same window, segmented the same way. Compare each absolute metric to the same platform last quarter and each business metric across platforms. Write down what changed and, more importantly, your best read on why, because a number without a hypothesis is just a number. Then decide one of three things for each line: hold, adjust, or investigate.

Keep the output short. A quarterly benchmark that runs to forty slides will not get read and will not get repeated. The version that survives is a single page: the metrics, the quarter-over-quarter movement, the cross-platform outcomes, and a short list of decisions. The discipline is in the repetition, not the production values.

The honest reason this checklist works is that it is boring and consistent, which is exactly what the un-watched channel needs. Microsoft rewards hands-on management precisely because so few advertisers give it any, and a quarterly benchmark is the lightest possible version of paying attention. It is the difference between a channel you hope is fine and one you can stand behind in a board meeting. If you would rather have someone run the pass for you, that is what our service is built to do.