Paid media
Quantify the pipeline you lose to budget and bid-limited impression share.
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- Claude, via MCP
How much revenue am I missing from lost impression share?
Divide current conversions by impression share to estimate the conversions available at 100% share, subtract what you get now, and multiply by value per conversion. At 45% impression share and 120 conversions a month, about 147 more are available; at ₹9,000 each that is ₹13.2 lakh a month, as an upper estimate.
At 45% impression share you’re capturing $108,000/month but leaving ~$132,000 to competitors. Closing the gap is a budget-and-bid question, not a new-channel one.
Assumes incremental impressions convert at your current rate, top-tier impression share often converts a touch lower, so treat this as an upper bound.
About this calculator
Impression share below 100% is not just a report metric, it is a dollar figure sitting in your auction report, revenue you would capture if a competitor weren't winning the rest of the impressions. This calculator turns your current impression share and conversion volume into the revenue you are leaving on the table, so budget or bid decisions can be made against a number instead of a feeling.
How to use it
- Enter your current impression share from your search-terms or auction insights report.
- Enter your current monthly conversions and the value of each conversion.
- Read total available conversions (what 100% impression share would produce), missed conversions, and the missed revenue per month and annualized.
Methodology
Total available conversions is your current conversions ÷ your current impression share (as a decimal), the implied conversion volume the full available auction would produce if you captured every impression at your current conversion rate.
Missed conversions is that total minus what you are actually capturing today, and missed revenue is missed conversions × value per conversion.
The calculator flags anything below 60% impression share for attention, since that is the point where a large share of available demand is going uncaptured.
This assumes incremental impressions, the ones you are currently missing, convert at the same rate as the impressions you already win. In practice, the impressions you are losing tend to be lower-rank or lower-relevance placements that convert somewhat lower, so treat the missed-revenue figure as a reasonable upper bound rather than a guarantee.
Conversions available and missed at your impression share
Conversions available = Current conversions ÷ Impression share Missed conversions = Conversions available − Current conversions Missed revenue per month = Missed conversions × Value per conversion Missed revenue per year = Missed revenue per month × 12
- Impression share
- Impressions you received ÷ impressions you were eligible for, from Google Ads' Search impression share column.
- Current conversions
- Conversions a month from the same campaigns.
- Value per conversion
- Average revenue or gross profit per conversion.
The model assumes missed impressions convert as well as the ones you win. They usually convert worse, because you tend to lose lower positions, less relevant searches and costlier auctions. Treat missed revenue as a ceiling. Google splits lost share into lost to budget and lost to rank; only the budget part is bought back with more budget.
Worked example: a search campaign at 45% impression share
A B2B services firm's main search campaign has a 45% search impression share and produces 120 qualified leads a month. Each lead is worth about ₹9,000 on average once close rate and deal size are taken into account.
- Conversions available = 120 ÷ 0.45 = 266.7.
- Missed conversions = 266.7 − 120 = 146.7.
- Missed revenue per month = 146.7 × ₹9,000 = ₹13,20,000.
- Missed revenue per year = ₹13,20,000 × 12 = ₹1.58 crore.
- If 30 points of the 55 lost are lost to budget and 25 to rank, the budget-recoverable part is roughly 30 ÷ 55 of the total, about ₹7.2 lakh a month at most.
The headline figure is the size of the market you are not reaching, not money you can collect by raising bids. Recover the budget-limited share first on your best-converting keywords, then work on rank through ad relevance and landing pages. Check what the extra spend would cost per lead with the CPL and CPA calculator, and compare with competitors using the competitor ad spend benchmarker.
What is a good impression share?
It depends on the keyword. Google describes impression share as a way to see whether your ads might reach more people with a higher bid or budget (Google Ads Help), not as a target in itself.
- Brand terms: aim close to full share, because competitors may bid on your name.
- High-intent, profitable terms: push share up while cost per acquisition stays under target.
- Broad or research terms: lower share is often the right choice, because extra impressions cost more than they return.
The tool flags under 60% for attention; that is a planning threshold, not a benchmark.
Impression share in India vs the US
In many Indian B2B categories, search volume is modest and a few advertisers dominate, so small budget changes move impression share a lot. Lost share to budget is common when daily budgets run out early in the day; check the hour-of-day report and consider ad scheduling before raising budget. See Google Ads CPC in India by industry for typical click prices.
US auctions on core B2B terms are often expensive, so buying back share can cost far more per conversion than the share you already hold. Model the marginal cost: the last points of impression share are usually the most expensive. Use the PPC click volume predictor to test what a budget increase buys.
Common impression share mistakes
- Treating missed revenue as guaranteed if you spend more.
- Raising budget when share is lost to rank, which bids into auctions you cannot win cheaply.
- Chasing full share on low-converting research keywords.
- Using account-level impression share, which mixes brand and non-brand campaigns.
- Ignoring the time of day: share lost in business hours can matter more than share lost overnight.
Sources
- About impression share, Google Ads Help. Accessed 2026-10-19.
FAQ
It is an upper-bound estimate. It assumes the additional impressions convert at your current average rate, but impressions you are currently losing to budget or rank limits often convert a bit lower than your best-performing placements, so expect the realized gain to land somewhat below this figure.
Not necessarily, chasing the last few points of impression share often means bidding into progressively worse placements at rising CPCs. Check whether the incremental CPA at higher impression share still clears your margin ceiling before committing more budget.
Check "lost impression share (budget)" versus "lost impression share (rank)" in Google Ads or the equivalent platform report. Budget-limited losses are fixed by raising spend; rank-limited losses need a bid, Quality Score, or ad relevance fix instead.
A monthly number can look small enough to ignore. Annualizing it puts the true, ongoing cost of under-owning impression share in the same terms as a budget or headcount decision, which is usually the comparison that actually gets the gap closed.
It is the impressions your ads received divided by the impressions they were eligible to receive, based on targeting, approval status and quality. Google reports it for campaigns, ad groups and keywords.
Lost to budget means your ads stopped showing because the budget ran out. Lost to rank means your ad rank, set by bid, ad quality and other factors, was too low to show. They need different fixes.
Google shows a dash when there is not enough data, such as for new or low-traffic keywords. Data can also take a day or two to update.
Numbers looking off?
If the model says one thing and the pipeline says another, that gap is usually where the revenue is. A 30-minute call finds it.
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