Avoid Overlapping Date Ranges in Scheduled Reports

Set Distinct Date Windows at the Schedule Level

Amazon Ads lets you schedule recurring reports by date range. To avoid overlap, align each report to a fixed period that ends before the next scheduled run begins. Rolling windows such as “last 7 days” are convenient, but they are risky when you merge daily exports because consecutive files will share at least one day.

• Use calendar-day or weekly ranges with explicit start and end dates.
• Set the next scheduled run to begin the day after the previous run ends.
• Avoid rolling windows for daily reports that will be combined into a master dataset.

Review File Details Before Merging

Before you combine files, confirm that the date range in each export matches the scheduled window. A file with a missing or unexpected date field can silently introduce overlap. If you use a tool like Amazon Ads Report Analyzer to receive scheduled daily emails, the same source-level checks still apply before totals are calculated.

• Compare the report start and end dates against the intended schedule.
• Confirm the file contains data only for the period you expected.
• Use row counts or time-stamped summaries to spot unexpected overlap early.

When This Matters Most

Overlapping schedules are most disruptive when you rely on daily exports for weekly or monthly performance reviews. A small overlap can make spend look higher than actual and distort ACOS or ROAS trends. This is especially relevant if multiple team members or clients receive copies of the same report and merge them independently.