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This page explains why SAP requires a Material Ledger Type to be defined for consultants, architects, and anyone setting up valuation in S/4HANA. In short, the Material Ledger Type defines which currencies SAP must track for stock valuation. It matters because SAP cannot value materials, calculate actual costs, or enforce consistency without knowing which currencies apply. Use it when a plant holds stock that must be valued in more than one currency, and avoid it only when inventory valuation is not required.
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Material Ledger does not start with the plant.
It starts with the question of currency.
Before SAP can value a single unit of stock, it must know which monetary perspectives matter. Company code currency. Group currency. Sometimes more. The Material Ledger Type is the object that answers that question.
Without a Material Ledger Type, SAP has no template for valuation. No currency structure. No agreement on what “value” even means. You can create plants, define material types, and configure finance all day long, but valuation has no frame of reference. SAP refuses to guess.
This is why defining the Material Ledger Type is always the first real step in making Material Ledger work.
A Material Ledger Type is a template that defines which currencies SAP must store for material valuation.
Company Code Currency is the legal currency used for local accounting.
Group or Controlling Currency is the currency used for consolidated reporting.
Defining an ML Type tells SAP:
“These are the currencies that matter. Track every material movement accordingly.”
In plain English: SAP will not value stock until it knows which currencies to care about.
Every valuation in S/4HANA depends on this definition. When goods are received, issued, revalued, or settled, SAP posts values in all currencies defined in the ML Type. Because S/4HANA is built around real-time, multi-currency finance, this definition is mandatory.
As a result, price determination, actual costing, and financial reporting all depend on the Material Ledger Type being correct before any plant is activated.