If your Google Ads spend in Power My Analytics matches the Google Ads interface on most days but is off by a small amount on a handful of individual dates, here's what's happening and how to fix it yourself.

What Is Happening

Your Google Ads cost for each day is stored in Power My Analytics when it syncs. Occasionally, the figure stored for one particular day ends up slightly different from the figure Google Ads shows later, and that day keeps its stored value until it is re-read.

The days around it are unaffected, which is why the difference shows up on a handful of scattered dates rather than across the whole range. A backfill re-reads the dates you choose from Google Ads and replaces the stored figures, which is why it is the fix.

For example, one comparison across a 24-day range found every date matching exactly except four scattered dates, with a combined difference of about 0.2% of total spend, Power My Analytics reading higher on each of those four dates.

How to Confirm You're Comparing the Same Thing

Before troubleshooting further, make sure the comparison itself is apples to apples:

1. Open your Google Ads report and segment it by day.
2. Confirm you're looking at the same Google Ads account and the same date range in both places.
3. Note which specific dates differ. If the difference is concentrated on a few dates rather than spread across the whole range, this article applies.

How to Fix It

1. In your hub, go to Sources.
2. Find your Google Ads source and open the Actions menu (the three-dot icon).
3. Select Backfill data range, then choose Custom to enter the specific dates that differ.
4. Wait for the backfill to finish, then refresh your report and compare again.

What You'll See

After the backfill completes, the corrected dates pick up the figures currently held by Google Ads, and your totals move to match. Dates that already matched are not affected.

If It Still Doesn't Match

A backfill resolves this in most cases, but not always. If your numbers still don't match after a full backfill, submit a ticket with the date range, the account, and the specific dates that differ, including both totals. Our support team will investigate those individually.

Related

• If conversions or revenue (rather than cost) are lower than Google Ads on older dates, see Why Conversions and Revenue Can Be Lower in Your Report Than in Your Ad Platform.
• If Cost returns 0 across every account rather than differing on a few dates, that's a different issue; submit a ticket so support can take a look.
• If Cost is missing specifically when paired with the Country or Country Code dimension, see Country Shows N/A When Paired with Cost in Google Ads Reports.