Division 296 super tax estimator (proposed reform)

What the calculator does

1. Excess above $3M. The portion of your TSB above the $3M threshold - this is the part Div 296 applies to.
2. Proportion of earnings.The same proportion of your fund's annual earnings is treated as attributable to the excess.
3. Additional 15% tax. Applied to those attributable earnings, on top of the existing 15% accumulation or 0% pension earnings tax.

What it doesn't do

• It uses a simplified mechanic. The actual Div 296 calculation is a notional earnings measure based on year-on-year change in TSB, adjusted for contributions and withdrawals. This calculator approximates it with a proportional split of the realised earnings you enter - close enough for a single-year estimate but not exact.
• It doesn't project balance growth. The $3M threshold isn't indexed; bracket creep pulls more members into Div 296 each year. The full Byrz engine models this trajectory across the hold period.
• It doesn't handle multi-member SMSFs. Div 296 applies per member. If your SMSF has multiple members, calculate each member's TSB separately.

Caveats

Division 296 is proposed as of late 2026 - not law. The mechanic, threshold and rate may all change in the final legislation. The current proposal applies from the 2025-26 income year (proposed — not yet enacted).

For SMSF property holdings specifically, the Byrz $49 property report models Div 296 alongside the existing 15% / 0% earnings tax across the full forecast horizon, and compares SMSF outcomes against personal, joint, trust and company ownership.