About Plus & Minus Accounting Software

Since 1982, Plus & Minus Accounting Software has been helping businesses simplify complex accounting workflows with a unique one-file, one-format, no-modules solution. Our mission is to empower small and medium-sized businesses with real-time accounting that cuts costs and saves time.

Our Story

Founded over four decades ago, we identified the frustration many companies face when juggling multiple accounting modules and data silos. Our founders designed Plus & Minus Accounting Software to eliminate that headache by consolidating everything into a single, powerful system — all in real-time.

Why Plus & Minus Accounting Software Is Different

One Format: Consistent, easy-to-understand data structure.
Real-Time: Make decisions faster with instant financial visibility.
Non-modular ERP architecture — no separate systems to integrate. No fragmented systems to manage or reconcile.
Single-file data model — All data in one place, no multiple databases. Financial and operational data always in sync
Every accounting function included — no add-on pricing or hidden complexity
Designed for growing, multi-entity businesses that need control without overhead
All financial, inventory, and operational data in one place — because Plus & Minus operates from a single-file data model, transactions across accounting, inventory, projects, and supply chain are always in sync, eliminating reconciliation delays and data mismatches common in modular systems.

Company History

Plus & Minus Accounting Software builds on the timeless principles of accounting laid down by Luca Pacioli in 1494. Our founders, Tim Mattingly and Tom Friedman, began their accounting journey in 1973 auditing a crane company with two domestic subsidiaries and one foreign subsidiary.

Back then, the books were kept by hand in ink by a meticulous German controller and an assistant. Original source documents were recorded in journals, then posted to general ledgers and subsidiary ledgers for receivables, payables, and fixed assets. Working trial balances served as the backbone for the final consolidated financial statements — a real-world demonstration of Pacioli’s double-entry bookkeeping treatise brought to life.

Inspired by this artful, disciplined approach, Tim and Tom developed Plus & Minus to capture the same elegance and rigor in a modern, real-time accounting solution for businesses everywhere.

Trusted for Over 40 Years

Our software is trusted by accountants, CFOs, and business owners worldwide who want to streamline operations and focus on growing their business — not wrestling with complicated accounting software.

Get Started Today

Ready to experience the power and control of Plus & Minus Accounting Software?

Schedule Your Free Demo Today!

Frequently Asked Questions

What is Plus & Minus Accounting Software?

Plus & Minus is a non-modular ERP accounting software that runs in a single file, combining GL, AP, AR, payroll, inventory, job costing, supply chain, and reporting in one fully integrated system. It is a real-time accounting solution designed to help small and medium-sized businesses manage all accounting functions without complex modules or integrations.

Who uses Plus & Minus?

Business owners, accountants, and CFOs who want a straightforward, reliable accounting system that saves time and reduces overhead.

How is Plus & Minus different from modular accounting software?

Unlike modular systems that require separate programs and constant reconciliation, Plus & Minus Accounting Software operates in a single file with one consistent format — no silos, no complicated integrations, just real-time accuracy.