The Same Money, Two Tax Rates, One Cap Between Them
Superannuation has two tax environments. In accumulation, investment earnings are taxed at 15%. In retirement phase, they are taxed at nil. The money, the portfolio and the member can be identical; what separates them is whether a retirement-phase income stream is being paid, and how much of the transfer balance cap remains.
- The answer: Accumulation earnings are taxed at 15%; retirement-phase earnings are exempt. Capital gains in accumulation receive a one-third discount if the asset was held over twelve months.
- The trap: Nothing moves automatically. A member who has met a condition of release but has not commenced a pension is still paying 15%.
- The recommendation: Fill the transfer balance cap with a retirement-phase pension and leave only the excess in accumulation. There is no other reason to hold money there after retirement.
Where the AI summary above gets this wrong
"Superannuation earnings are taxed at 15% until you retire, then become tax-free."
That's surface-true. Here's what it misses:
- Retiring does not change the tax; commencing a pension does — The exemption attaches to assets supporting a retirement-phase income stream. A retired member who has not started one is still in accumulation and still paying 15%.
- Only what fits within the transfer balance cap can move — A balance above the cap stays in accumulation permanently, which is why large balances end up split across both phases.
01 What each phase taxes
In accumulation, the fund pays 15% on investment earnings and on concessional contributions received. Capital gains on assets held for more than twelve months receive a one-third discount, giving an effective 10% rate on those gains.
In retirement phase, earnings on the assets supporting the income stream are exempt current pension income and are not taxed at all. Capital gains on those assets are likewise exempt.
Franking credits behave well in both. In accumulation they offset the 15%; in retirement phase, with no tax to offset, they are refunded to the fund — which is the mechanism described in the franking credits post.
Source: ATO — Tax on super benefits
02 What the difference costs
On a $500,000 balance earning 6%, the 15% rate costs $4,500 a year. Compounded across a retirement of twenty years the cumulative difference runs to six figures, which is why the phase question is worth more than most investment decisions.
That is also the honest cost of holding a balance above the transfer balance cap. Money that cannot move into retirement phase is not being punished — 15% is still far below most marginal rates — but it is paying more than the same money one dollar under the cap.
The worked example puts a number on your own balance and return. What it shows most usefully is how quickly a delay in commencing a pension becomes expensive.
Shows: the fund tax paid on earnings in accumulation phase over a period, which the same balance in retirement phase would not pay. Ignores: the one-third capital gains discount in accumulation, franking credits, contributions and withdrawals over the period, and the transfer balance cap.
Source: ATO — Transfer balance cap
03 Getting the money into the better phase
Commencing a retirement-phase income stream is the only route, and it requires a condition of release with a nil cashing restriction. Meeting the condition and doing nothing leaves the money where it is.
The amount that can move is limited by your personal transfer balance cap. A balance above it stays in accumulation, and the correct structure for a large balance is a pension at the cap plus an accumulation account holding the rest.
Where circumstances change, money can move back. A commutation returns an amount to accumulation and creates a transfer balance debit, which frees cap space — the mechanics are in the excess transfer balance reference.
Fifteen per cent sounds small and it is the difference between a balance that lasts and one that does not, once you compound it over a retirement. The decision costs nothing — commence the pension — and the only thing standing between most people and it is that nobody told them the exemption attaches to the pension rather than to their retirement.
FAQ
How does keeping money in accumulation phase versus pension phase change my tax?
Accumulation earnings are taxed at 15% in the fund; retirement-phase earnings are exempt. On a $500,000 balance earning 6% that is $4,500 a year, compounding across the whole of retirement.
Are the earnings in my super pension account genuinely tax-free?
Yes, where the account is in retirement phase. Earnings and capital gains on assets supporting a retirement-phase income stream are exempt current pension income.
How much can I hold in retirement phase before earnings start being taxed?
Up to your personal transfer balance cap, credited when you commence an income stream. A balance above the cap stays in accumulation and pays 15% on its earnings.
Sources
Regulator references
- ATO — Tax on super benefits · Australian Taxation Office · 2026How super benefits are taxed on withdrawal, and how that changes with age.Last verified: 2026-09-07
- ATO — Transfer balance cap · Australian Taxation Office · 2026The cap that applies when a retirement phase income stream starts.Last verified: 2026-09-07
Calculator unit tests · the assertions this page's worked example is checked against, and their last result
Changelog
- 2026-09-07 — initial publish (new format)
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Jordan Reeves
Founder of Talk Through Wealth. A software engineer for over a decade before turning to retirement planning, Jordan built the projection engine after watching family members get fragmented, country-by-country advice that never reconciled. He writes about retirement the way the engine computes it: month-by-month, lifetime-long, and skeptical of any rule of thumb that hasn't been run through the math.