Sage 50 · 3 min read · Updated September 3, 2026

Converting Legacy Peachtree Accounting Data to QuickBooks

How to move decades-old Peachtree accounting data into QuickBooks, from preparation and file checks to verifying balances after the conversion.


Peachtree Accounting was born in Atlanta and took its name from the city’s best-known street. The buildings along Peachtree keep changing hands and getting redeveloped, and the software went through its own transition: Peachtree became Sage 50. Many businesses that grew up with it now run QuickBooks. If your books still live in an old Peachtree install, we will walk you through the move.

One product, several names

Before planning the conversion, get the product names straight. Peachtree Accounting was the United States product; Simply Accounting was its Canadian counterpart. Sage later unified both under the Sage 50 name, so Peachtree, Simply Accounting, and Sage 50 describe the same family. Sage BusinessWorks is a different product with its own conversion path. Knowing which one you have determines how the data gets read.

Full history or open balances only?

The biggest cost and time driver is history. A conversion can carry every transaction since the file was created, or just the lists plus open invoices, bills, and opening balances as of a cutoff date. Many firms pick a fiscal year end, bring balances forward, and leave the deep archive in the old program for reference. Few books need twenty years of detail in the new system. Decide deliberately rather than by default.

Prepare the file before anything moves

Preparation makes or breaks the job. Take a verified backup of the old company and store it somewhere safe; the original file should never be the only copy. Print or export a trial balance at your chosen cutoff date, because that report becomes the yardstick for the finished work.

Then tidy what you can. Merge duplicate customer and vendor names, deactivate accounts you no longer use, and settle any half-posted entries. Dirty data converts into dirty data.

What actually converts to QuickBooks?

Core financial data is the heart of any conversion, and it is what our Peachtree to QuickBooks conversion service is built around: the chart of accounts, customer and vendor lists, item lists, open receivables and payables, and the history behind your balances. The treatment of payroll, inventory assemblies, and job costing varies with the age of the source file and the QuickBooks edition you choose. Settle those questions before work starts, not after. If a provider cannot tell you clearly how a given area will be handled, treat that as a warning sign.

How do you verify the result?

A conversion is not finished when the file opens; it is finished when the numbers agree. Compare the trial balance in QuickBooks to the one you printed before the move, line by line. Count customers, vendors, and items on both sides. Reconcile the first bank statement after the cutoff against the new file. Spot-check a handful of open invoices by number and amount. An hour of checking catches what weeks of assumption miss.

Is staying on Sage the better call?

Sometimes the problem is not the software but the edition underneath it. If you are on Quantum and paying for users and modules you no longer need, a downgrade to Pro or Premium removes that layer and keeps every transaction in place. That is a smaller job than a full conversion, and for some firms it is the right one. Our Sage 50 Quantum downgrade service covers that path when it fits.

A practical first step

Whichever route you choose, produce two artifacts this week: a current backup of the company and a trial balance as of your intended cutoff date. Every conversion and downgrade starts from those, and having them ready shortens every conversation that follows. The old file keeps running untouched in the meantime, so there is no risk in preparing early.