Glossary
What is conversion delay in Google Ads?
Melvin Salas1 min readVerified 4 October 2026
Short answer
Conversion delay is Google's name for the time between impression and conversion, which Google says affects which values you see in your account. Sometimes the conversion happens within a day of the click, but Google says conversions can be reported up to 90 days after the click, depending on the conversion window that you've chosen.
The trap Google names is comparison. If you compare recent performance with past performance, Google says your recent performance might not look as strong, because some of the people who clicked your ad haven't converted yet. Since those conversions are missing but your spend is fully reported, it may appear that you have fewer conversions and a higher cost per conversion.
To see your own delay, Google says to check that the date range ends at least 30 days ago, or longer if you have a longer conversion window, then segment by Conversions > Days to conversion. If you use Smart Bidding, Google says you can also see it in your bid strategy reports when more conversions are likely to arrive in your selected date range: hover over Conversions, Cost/conv. or Conv. rate to see the average duration of the delay and how many conversions Google predicts haven't been reported yet.
Google also says its bidding algorithms weigh recent data less heavily for advertisers with lengthier conversion cycles, which it says helps prevent overreactions to recent clicks that are experiencing conversion delays.
Our practice, not Google's: before comparing a recent month with an older one, we read the account's own delay first, and either leave the unfinished days out or say plainly that they are in.
We check this on every account we run
Riibon ties Meta and Google Ads back to outcomes measured outside the platforms, payments and bookings, so the number a decision rests on is one the business would recognise. When the platform and the business disagree, we show both and say which one we trusted.
Ask the Riibon app what your own account is counting as a conversion. It is free, with no time limit and no card. Or book a call and we run it for you.