Byrz

Sources & references

Every section, ruling and Budget paper the engine draws on.

The Byrz tax engine is built on primary sources. Below is the full reference list - every ITAA 1997 section, ATO ruling, Treasury paper, Budget announcement and State Revenue Office citation the engine consults. Each links directly to the gov.au original.

ITAA 1997

  • s 8-1 - General deductions ↗

    Allows interest and ordinary outgoings on an income-producing rental property to be deducted from assessable income. The mechanic that makes negative gearing work under current law.

  • s 115-100 - 50% CGT discount for individuals & trusts ↗

    Provides the 50% discount on long-term capital gains for individuals and trusts (held >12 months). 33.3% for SMSF accumulation under s 115-100(b).

  • s 104-10 - CGT Event A1 (disposal) ↗

    The most common CGT event for property - disposal of a CGT asset. Byrz models Event A1 only.

  • Div 110 - Cost base & reduced cost base ↗

    Defines the adjusted cost base of a CGT asset, including the cost-base reduction for Div 43 capital works deductions claimed during the hold (s 110-25).

  • Div 40 - Capital allowances (plant & equipment) ↗

    Depreciation on plant items in a property. s 40-27 disallows Div 40 deductions on previously-used plant in established residential acquired after 9 May 2017.

  • Div 43 - Capital works deductions ↗

    Depreciation on the structural cost of residential buildings whose construction commenced after 17 July 1985. Typically 2.5% per year over 40 years. Cost-base reduction applies under s 110-25.

  • Div 36 - Tax losses ↗

    The current carry-forward rules for tax losses. The proposed 2027 negative-gearing restriction modifies this for established residential property losses (quarantine against future residential rental income only).

ATO

Treasury

Budget

State revenue