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Invoice Comparison Tool

Compare two invoices line by line and see exactly what changed.

Invoice Tools Reviews Free · no sign-up

Quick Tool Overview

The Invoice Comparison Tool compares two invoices line by line — this month against last, an invoice against its quote, a renewal against the year before — and breaks the change in the total into price, quantity and added or removed lines.

What it does
Compares two invoices line by line
You give it
Two lists of lines
You get back
Every difference, and what caused the total to move
Best for
Renewals, revised invoices and quote checks
Invoice Tools Free, unlimited use No sign-up Runs in your browser

About the Invoice Comparison Tool

Two invoices that should be the same and are not is a problem that takes twenty minutes to find by eye and ten seconds to find properly. It comes up constantly: this month’s invoice against last month’s, an invoice against the quote it came from, a supplier’s revised invoice against the one they sent first, or a renewal against the year before.

This compares them line by line. Lines that appear on both are matched by description and the differences in quantity, unit price and total are shown for each. Lines that appear on only one side are listed as added or removed. And the totals are compared with the change broken into how much came from price rises, how much from quantity changes, and how much from lines appearing or disappearing — which is the analysis that actually answers why this one is more than the last one.

Percentage changes are shown alongside the amounts, because a 40% rise on a small line often matters more than a 2% rise on a large one when you are deciding what to query.

Key features of the Invoice Comparison Tool

Matched by description

Including lines that were reworded slightly.

Added and removed listed

Often where the real difference is hiding.

Change broken down

How much came from price, quantity and new lines.

Percentages alongside amounts

A 40% rise on a small line can matter more than 2% on a large one.

Quote against invoice

Every line should match what was accepted.

How to use the Invoice Comparison Tool

  1. 1

    Paste the first invoice

    Description, quantity and price, one line each.

  2. 2

    Paste the second

    The later version, the renewal, or the quote it came from.

  3. 3

    Read the line differences

    Matched by description, with price and quantity changes shown.

  4. 4

    Check added and removed lines

    Often where the real difference is hiding.

  5. 5

    Read the total breakdown

    How much of the change came from price, quantity and new lines.

Frequently asked questions

By description, ignoring case and punctuation, and then by close similarity for lines that were reworded slightly. Anything that cannot be matched is reported as added or removed rather than silently paired with something else.

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