Series 6 - The Clean Core Imperative: Externalising Tax Logic From SAP

The Clean Core imperative is simple to state and complex to implement. This deep dive provides the most complete technical and architectural treatment of what SAP Clean Core actually means for global tax compliance — from the specific configuration boundaries of what SAP-native compliance can deliver, through the integration architecture that connects a Clean Core ERP to an external compliance pla...

The decoupled vs. embedded debate in SAP tax architecture is one of the most consequential technical arguments a programme team can have — and one of the most poorly structured. In most S/4HANA programmes, it is not even framed as a debate: embedded is the default, decoupled is proposed by someone who has read the arguments, and the conversation ends when the programme manager notes that decouplin...

The case for embedding tax logic inside SAP was, historically, straightforward. The ERP is where the transaction happens. Keeping tax determination, validation, and reporting close to the transaction source reduces integration complexity, eliminates external dependencies, and leverages the deep integration between FI/CO and the tax processing logic that SAP has built over decades. This case is no...

There is a specific moment in every S/4HANA or RISE programme when the tax team and the architecture team finally sit in the same room and ask the question that should have been on the agenda from day one: if we cannot customise the ERP core, where does our tax logic live? This episode is the brief that answers that question directly — for the SAP architects, FI/CO consultants, tax technology lead...