What is Single Source of Truth (SSOT)?
A single source of truth is one authoritative, agreed-upon place where a given piece of data is maintained and trusted across the organisation.
Definition
A single source of truth (SSOT) is the principle that for any given data element there should be one authoritative system or record that everyone relies on, rather than multiple conflicting copies. It does not necessarily mean all data lives in one system, but that there is a clearly designated master for each type of data, with other systems referencing or synchronising from it. Achieving an SSOT reduces errors, reconciliation effort, and disagreements about which figure is correct. It is a central goal of ERP implementations, master data management, and data governance.
How Single Source of Truth Works in ERP
An ERP is frequently positioned as the single source of truth for financial and operational data because it consolidates transactions from across the business into one consistent ledger and dataset. Integrations are designed so that the ERP holds the authoritative version of records such as inventory balances and customer accounts, with other systems updating from it. This avoids situations where finance, sales, and operations each report different numbers. Maintaining an SSOT depends on disciplined integration, governance, and avoiding uncontrolled spreadsheets and shadow systems.
ERP Vendors with Strong Single Source of Truth
Oracle NetSuite
The original cloud ERP — built for fast-growing companies
SAP S/4HANA Public Cloud
Standardised cloud ERP with quarterly auto-upgrades and low TCO
Microsoft Dynamics 365
Modular ERP + CRM tightly integrated with Microsoft 365
Acumatica
Resource-based cloud ERP — unlimited users, pay by usage
Frequently Asked Questions
Does a single source of truth mean all data must be in one system?
No; it means each data element has one designated authoritative source, and other systems reference or synchronise from it, so an organisation can have several systems while still maintaining clear ownership of each data type.
Why is an ERP often called the single source of truth?
An ERP consolidates financial and operational transactions from across departments into one consistent dataset, so it naturally becomes the authoritative record for figures like balances, inventory, and customer accounts.