Every Reinvested Dividend Is a New Parcel to Track
A dividend reinvestment plan converts a cash dividend into additional shares, and the tax treatment is exactly as if the cash had been received and then spent on shares. The dividend is assessable with any franking credit, and the shares acquired form a new parcel with their own cost base and acquisition date — which is where the record-keeping problem starts.
- The answer: The dividend is assessable income with its franking credit, and the shares acquired have a cost base equal to the amount reinvested.
- The trap: Tax is payable on a dividend you never received in cash. A large reinvested dividend can create a tax bill with no cash to pay it.
- The recommendation: Download and keep every reinvestment statement. Twenty years of a plan is dozens of parcels and registries do not keep records indefinitely.
Where the AI summary above gets this wrong
"Dividend reinvestment plans let you compound your returns without paying tax."
That's surface-true. Here's what it misses:
- The dividend is fully assessable — It is taxed exactly as if it had been paid in cash, with the franking credit grossed up. Reinvesting changes what happens to the money, not whether it is taxed.
- Each reinvestment is a separate CGT parcel — With its own cost base and acquisition date, which is what makes a long-held reinvested holding difficult to calculate a gain on years later.
01 What actually happens
The company declares a dividend, you are treated as having received it, and it is applied to purchase shares at a price set by the plan. Both events are real for tax purposes: assessable income, and an acquisition.
The dividend is assessable in full and carries any franking credit, which is grossed up in your income and offset against your liability in the ordinary way described in the franking credits post.
The shares acquired have a cost base equal to the amount applied, and an acquisition date of the allotment. Any discount to market price offered by the plan reduces the cost base rather than creating income.
Source: ATO — Dividends
02 The record-keeping problem
A plan running for twenty years on a quarterly or half-yearly dividend creates forty to eighty parcels. Each has its own cost base, its own date, and its own status under the twelve-month rule.
Share registries do not retain records indefinitely, and a change of registry, a merger, or a demerger frequently breaks the history. Reconstructing a cost base from announcements and price data years later is expensive and approximate.
The remedy is to download each statement when it arrives and keep them together. It is five minutes a year and it is the difference between a calculable gain and an estimated one, in the same way as the file described in the inherited cost base reference.
Shows: how many CGT parcels a dividend reinvestment plan creates over the years, and the average cost base of each. Ignores: changes in the dividend amount and share price over time, any discount the plan offers, and share splits or consolidations.
Source: ATO — Capital gains tax
03 The cash-flow issue
Tax is payable on the dividend even though no cash arrived. For a retiree with a substantial reinvested holding and little other income the franking credits usually cover it, and for someone on a higher rate they do not.
That is the main argument for switching a plan off in the years before or during retirement: the income is wanted in cash, and the tax is payable regardless.
Switching off also stops adding parcels, which makes the eventual sale calculation simpler. For a holding you expect to sell or leave to a beneficiary, that simplification has real value.
Twenty years of a reinvestment plan is eighty parcels and eighty acquisition dates, and the registry will not have all of them when you need them. Download the statement each time it arrives. It is the cheapest possible insurance against an expensive reconstruction, and the person who most often needs it is not you but whoever inherits the holding.
FAQ
How does a dividend reinvestment plan affect my cost base and future CGT?
Each reinvestment is a separate parcel with a cost base equal to the amount applied and an acquisition date of the allotment. A long-held plan creates dozens of parcels, each needing its own record.
Do I pay tax on a reinvested dividend?
Yes, in full, with any franking credit grossed up. You are treated as having received the dividend and then spent it on shares, so tax is payable even though no cash arrived.
Should I turn off a reinvestment plan in retirement?
Frequently yes. The income is usually wanted in cash, the tax is payable either way, and switching off stops adding parcels that complicate the eventual sale.
Sources
Regulator references
- ATO — Dividends · Australian Taxation Office · 2026How dividends are taxed in Australia and what must be declared.Last verified: 2026-09-07
- ATO — Capital gains tax · Australian Taxation Office · 2026Capital gains tax: the events that trigger it and how the gain is worked out.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.