BILLING_SECDEP_INTEREST_RATE

The DAILY interest rates used by billing when calculating the interest amount

Column Schema

BILLRUNNO

The billing run no. the SDA application is processed and interest calculated

SQL Type: NUMBER(3,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

CONTRACTYEAR

The billing contract year the SDA application is processed and interest calculated

SQL Type: NUMBER(4,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

EFFECTIVEDATE

The effective date of the new interest change

Warning

Despite what the name suggests, this is a datetime, not a date.

SQL Type: DATE Polars Type: pl.Datetime()

This column is mandatory, and a primary key.

Example: 2026/01/20 00:05:00

INTEREST_ACCT_ID

The interest account ID used by security deposit interest calculation

SQL Type: VARCHAR2(20) Polars Type: str

This column is mandatory, and a primary key.

WEEKNO

The billing week no. the SDA application is processed and interest calculated

Warning

There may be 53 weeks in a year, depending on how weeks align to the year start/end.

SQL Type: NUMBER(3,0) Polars Type: pl.UInt16

This column is mandatory, and a primary key.

INTEREST_RATE

The interest rate to apply from the effective date

SQL Type: NUMBER(18,8) Polars Type: pl.Float64

This column is not mandatory.

New Data Timing

After posting a billing run (final and revision)

Code Examples

Polars

Casting is enums, categoricals etc is not essential, but may speed up parsing. Swapping int for pl.UInt16, pl.Int32 would also speed up parsing. However some of the datatypes are inferred, so they may be wrong.

This code deduplicates for you. Deduplication is normally only required across multiple months.

This code assumes that all columns are present, which may not be true for older files.

import polars as pl
import polars.selectors as cs

# e.g. "2029/03/15 00:05:00"
dt_s_fmt = "%Y/%m/%d %H:%M:%S"

csv_paths = ["SOMEFILE.CSV", "OTHERFILE.CSV"]

lf = (
    pl.concat(
        [
            pl.scan_csv(
                csv_path,  # must be unzipped beforehand
                skip_rows=1,  # skip the header
                infer_schema=False,  # much faster
            )
            .filter(cs.by_index(0) == "D")  # drop the footer
            .select(~cs.by_index(range(4)))  # drop metadata columns
            for csv_path in csv_paths
        ],
        how="diagonal_relaxed",
    )
    .with_columns(
        pl.col("EFFECTIVEDATE").str.strptime(pl.Datetime, dt_s_fmt),
    )
    .cast(
        {
            "BILLRUNNO": int,  # or pl.UInt16
            "CONTRACTYEAR": int,  # or pl.UInt16
            "INTEREST_ACCT_ID": str,
            "WEEKNO": int,  # or pl.UInt16
            "INTEREST_RATE": pl.Float64,
        }
    )
    # Deduplicate
    # We want one row per ['BILLRUNNO', 'CONTRACTYEAR', 'EFFECTIVEDATE', 'INTEREST_ACCT_ID', 'WEEKNO']
    .unique(
        subset=[
            "BILLRUNNO",
            "CONTRACTYEAR",
            "EFFECTIVEDATE",
            "INTEREST_ACCT_ID",
            "WEEKNO",
        ],
        keep="any",
    )
)

Nemosis

This table is not yet available in Nemosis.

Availability

AEMO's documentation states that this table's visibility is "Public". However, it is not available in the public monthly MMSDM archive. AEMO probably call this public because it is available to all market participants over private FTP.

There is a chance that is is still public to non-participants. It may only be available for some months; or (rarely) it may be available in a non-standard location.

Deduplication and PDR Loader Configuration

The primary keys are:

• BILLRUNNO

• CONTRACTYEAR

• EFFECTIVEDATE

• INTEREST_ACCT_ID

• WEEKNO

The transaction type is "insert", which means that you will usually not see duplicate data. If you do, you can deduplicate based on the primary keys, without sorting first. Rows from different files with the same primary keys should have the same values.

PDR Loader configuration is:

Report Name	Report Subtype	Version
BILLING	SECDEP_INTEREST_RATE	1

This means that the CSV files start with metadata columns:

I,BILLING,SECDEP_INTEREST_RATE,1,...
D,BILLING,SECDEP_INTEREST_RATE,1,...

Links

This page as JSON (schema documented here, but may change)

Download a JSON Schema specification for this table.

Official AEMO schema documentation

Other Information

Package: BILLING_RUN

Copy as Markdown