BSIK & BSAK in S/4HANA

Compatibility viewFI-AP

Short answer

In S/4HANA, BSIK and BSAK are compatibility views, not tables. Vendor line items live in ACDOCA — but open-item status and payment terms stay in BSEG. Read the released CDS view I_OperationalAcctgDocItem (FinancialAccountType = 'K'): it surfaces the supplier, payment terms, and due date in one place. Don't extract from BSIK/BSAK.

BSIK · openBSAK · cleared────▶ACDOCAamountsBSEGopen items + termsI_OperationalAcctgDocItem

What they were

In ECC, Accounts Payable kept secondary index tables for vendor (Kreditor, the “K”) line items: BSIK held open items, BSAK held cleared ones. When an invoice was paid, the record moved from BSIK to BSAK.

What changed in S/4HANA

The names remain as compatibility views. The accounting line item resolves to ACDOCA; the open item and its payment terms stay in BSEG.

Object	Was	Now in S/4HANA
BSIK	Vendor open-item index (table)	Compat view → ACDOCA
BSAK	Vendor cleared-item index (table)	Compat view → ACDOCA
ACDOCA	—	Transparent table — the accounting line item (amounts, account)
BSEG	—	Transparent table — open-item management + payment terms

In S/4HANA, BSEG didn’t disappear — it changed role. It is now the financial-operations line item (open items, payment terms, baseline date); ACDOCA is the financial-accounting line item. Vendor aging needs both.

Where the fields went — BSIK to ACDOCA / BSEG

BSIK / BSAK field	Lives now in	Field
BUKRS	ACDOCA	RBUKRS
LIFNR	ACDOCA · CDS	LIFNR · Supplier
HKONT (recon acct)	ACDOCA	RACCT
GJAHR	ACDOCA	GJAHR
BELNR	ACDOCA	BELNR
BUZEI	ACDOCA	DOCLN
DMBTR / WRBTR	ACDOCA	HSL / TSL
SHKZG	ACDOCA	DRCRK
AUGBL	ACDOCA	AUGBL
ZTERM (payment terms)	BSEG	CDS: PaymentTerms
ZFBDT / ZBD1T (baseline / days)	BSEG	CDS: DocumentItemDate / NetPaymentDays

The last two rows are the AP gotcha: payment terms and the baseline date are not in ACDOCA. That is why vendor aging reads the CDS view (which joins BSEG), not raw ACDOCA.

How to query it now

Vendor line items with net due date · released CDS views · parameterized

SELECT  je.CompanyCode,
        it.Supplier,
        je.AccountingDocument,
        je.FiscalYear,
        it.AmountInTransactionCurrency           AS amount,
        it.PaymentTerms,
        it.NetPaymentDays,
        ADD_DAYS( it.DocumentItemDate,
                  TO_INTEGER(it.NetPaymentDays) ) AS net_due_date
FROM    I_JournalEntry             AS je
JOIN    I_OperationalAcctgDocItem  AS it
        ON  je.CompanyCode        = it.CompanyCode
        AND je.AccountingDocument = it.AccountingDocument
        AND je.FiscalYear         = it.FiscalYear
WHERE   it.FinancialAccountType   = 'K'      -- K = vendor (Kreditor)
  AND   je.CompanyCode            = :company_code;

Open vs cleared: BSIK held only open items. In S/4HANA, open-item status is managed in BSEG — a cleared item carries its clearing document / clearing date. Filter on that for open items, or take the status from BSEG; ACDOCA alone won’t give a clean open/cleared split.

Standard line-item report: FBL1N → S/4HANA Fiori app Manage Supplier Line Items.

Extract it compliantly

Method	Use when
Released CDS view + SLT	Bulk to a warehouse — the owned-layer path (I_OperationalAcctgDocItem)
Table / Table-CDC	Direct ACDOCA + BSEG replication with delta
ODP-OData	SAP-sanctioned API, lower volume
SAP BDC / Datasphere Replication Flow	SAP-native pass-through (Delta Sharing)

Not ODP-RFC. SAP Note 3255746 prohibits third-party ODP-RFC extraction, and a June 2026 security patch blocks it.

ACDOCA — the Universal Journal hub · BSID / BSAD → ACDOCA — the customer (AR) side · Extraction pattern

Moving AP aging off BSIK/BSAK?

We ship the CDS / SLT config, the due-date SQL, and dbt models — reconciled to the AP sub-ledger, and you own the code.

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