A reconciliation should not just tell you whether two totals agree. It should tell you what needs review.

Four buckets to create

Bucket Meaning Review action
Matched The records line up under the matching rule tie to summary
Source only Present in the first file only investigate omission or timing
Target only Present in the second file only investigate extra or timing
Review needed Close but not exact apply judgment

Why this works

The reviewer does not need to scan every row. They need a clean summary and a focused exception list.

Accounting takeaway

The best reconciliation is not the one with the most formulas. It is the one that explains the exceptions clearly.