Sage 50 vs Sage 100: Which QuickBooks Conversion Are You Actually Doing?

Written & reviewed by Ram Singh, founder, Numerawise Solutions · Last reviewed September 27, 2026

The short answer: Sage 50 and Sage 100 are two different Sage products, not two sizes of the same one, and the confusion is common enough that it is worth settling before you price a conversion. Sage 50 descends from Peachtree Accounting; Sage 100 descends from the MAS 90 and MAS 200 line. They share a publisher and a naming scheme, not a database, a file format, or an upgrade path between them. This page is a five-minute identification check, a side-by-side of what each product actually is, and a router to the right Numerawise conversion page — because a Sage 50 file and a Sage 100 file need completely different extraction methods, and giving one to the wrong process does not work.

Two products, one confusing pair of names

Sage renamed several of its separate US product lines onto a single “Sage + number” scheme in 2012–2013: Peachtree Accounting became Sage 50, the MAS 90 and MAS 200 line became Sage 100, and Sage’s mid-market ERP became Sage 300. The numbers read like a size ladder — 50, then 100, then 300 — but the products underneath were never merged or built on a shared codebase. Sage 50 is desktop small-business accounting; Sage 100 is a client/server or SQL-based system with modules Sage 50 has never had. Neither one updates into the other, and a Sage business partner moving a client from 50 to 100 treats it as a full migration with its own data-mapping work — the same category of project as moving either one to QuickBooks.

How to tell which one you actually have

Five minutes with the software settles it, before you call anyone for a conversion quote:

1. Check Help > About, or the login screen. Sage 50 names an edition — Pro, Premium, or Quantum. Sage 100 has carried no edition name on that screen since version 2023, when Sage folded Standard, Advanced and Premium into one product with an installation-architecture choice instead.
2. Look at the backup file. Sage 50’s own backup is a single file with a .PTB extension — a holdover from its Peachtree years. Sage 100 has no equivalent single-file backup: its data sits in a MAS90 folder structure, or, on SQL installs, in databases named MAS_SYSTEM and MAS_ plus a company code.
3. Count users and ask what you pay. If you are on 1–40 users at a published monthly rate under a tier called Pro, Premium or Quantum, that is Sage 50 — Sage publishes those three tiers with a hard 40-user ceiling on Quantum. If your renewal is a partner-quoted figure with no tier name anyone recognizes, that is Sage 100; Sage does not publish a Sage 100 price list.
4. Look for modules Sage 50 has never had. Production Management, Inventory Requirements Planning, Bill of Materials routings, or a multi-segment (multi-part, dashed) account number all mean Sage 100.
5. Consider the operation. More than one warehouse with reorder points, or a manufacturing or distribution business that has outgrown basic accounting, is a Sage 100 profile; Sage sells Sage 50 for single-location small-business accounting.
6. Watch for a third name. “Sage 100 Contractor” is a separate, construction-specific product (formerly Sage Master Builder) with its own data structure — not standard Sage 100, and not Sage 50 either.

What each is actually built for

Sources: Sage’s Sage 50 Accounting compare-features page and Sage’s Sage 100 Customer Upgrade Guide (“Changes in Version 2023 → Installation Simplification”), both read 27 September 2026. No Sage prices are printed here beyond the Sage 50 tier structure Sage itself publishes; Sage 100 has no published price list to quote.

Which conversion is actually yours

If the checks above point to Sage 50: Sage 50 to QuickBooks covers the move in general, Sage 50 to QuickBooks Enterprise is the page if Enterprise is the destination, and if a renewal date is what is driving the question, the Sage 50 renewal worksheet runs the 24-month numbers against your own invoice.

If they point to Sage 100: Sage 100 to QuickBooks covers the general move, Sage 100 to QuickBooks Enterprise is built for inventory-heavy companies, the Sage 100 renewal worksheet handles a renewal-date decision, and Sage 100 Standard vs Advanced vs Premium is the page if the real question is your install architecture rather than leaving Sage at all.

If it is Sage 100 Contractor: that is a separate construction product with its own data structure, and Sage 100 Contractor to QuickBooks is the page built for it — the standard Sage 100 pages above assume a different source system.

What changes about the conversion itself

Either source, a QuickBooks conversion carries the same categories across: chart of accounts, customers, vendors, items, open receivables and payables, inventory on hand, and as many years of history as you scope, reconciled to the source system’s ending balances at cutover. What differs is extraction, and what has no home on the other side. A Sage 50 conversion reads the company data file or a .PTB backup directly — there is rarely anything in a Sage 50 file that QuickBooks cannot represent, since Sage 50 does not carry Sage 100’s manufacturing-specific modules. A Sage 100 conversion reads a copied MAS90 folder or a restored SQL backup of the MAS_ databases, and its multi-segment account numbers flatten into QuickBooks accounts plus classes; Production Management work tickets, Inventory Requirements Planning, and Bill of Materials routings have no QuickBooks equivalent and are archived rather than converted — the same finding our own Sage 100 editions page reached looking at the problem from the other direction.

Frequently asked questions

Is Sage 50 just an older or smaller version of Sage 100?

No. They’re two different Sage product lines with separate histories and separate databases, and there’s no built-in upgrade path from one to the other. Sage 50 descends from Peachtree Accounting; Sage 100 descends from the MAS 90 and MAS 200 line. Moving between them is a full migration — the same category of project as moving either one to QuickBooks.

Why do the names sound like the same product at different sizes?

Because Sage renamed several separate US product lines onto a single “Sage + number” scheme in 2012–2013: Peachtree became Sage 50, MAS 90/200 became Sage 100, and Sage’s mid-market ERP became Sage 300. The naming implies a size ladder; the products underneath were never merged.

How do I check which one my company runs without calling IT?

Open Help > About or look at the login screen: Sage 50 names an edition — Pro, Premium, or Quantum. Sage 100 has carried no edition name there since version 2023. You can also check the backup file: Sage 50 uses a .PTB extension; Sage 100’s data lives in a MAS90 folder or, on SQL installs, in databases named MAS_SYSTEM and MAS_ plus a company code.

Which one costs more to convert to QuickBooks?

Numerawise quotes Sage 100 conversions at $2,000–$6,000 depending on history depth, modules and file size, and Sage 50 conversions from $500, per our live conversion pages. Sage 100’s higher range reflects the modules — Production Management, multi-warehouse inventory, multi-segment accounts — that Sage 50 files do not carry.

Still not sure which one you are on? Send us a screenshot of the login screen and we will tell you free, before any quote.