Investment Income Tax Australia 2025: Complete Guide
How dividends, franking credits, interest income, and capital gains are taxed - with strategies to minimize your investment tax bill.
IntuitiveCalc Team
Financial Content Specialist
Australian investors earn income from various sources - dividends, interest, distributions, and capital gains. Each type of investment income has different tax rules, and understanding them can save you thousands in tax each year.
Key Tax Rates 2024-25
Investment income is generally taxed at your marginal tax rate (0% to 45% + 2% Medicare Levy). However, franking credits and the CGT discount can significantly reduce your effective tax rate on investments.
Table of Contents
Dividend Income & Franking Credits
When Australian companies pay dividends, they've often already paid company tax (30% or 25% for small companies). Franking credits (also called imputation credits) represent this tax already paid and can reduce your personal tax.
How Franking Credits Work
| Dividend Type | Company Tax Paid | Franking Credit |
|---|---|---|
| Fully Franked (30%) | 30% | $42.86 per $100 dividend |
| Fully Franked (25%) | 25% | $33.33 per $100 dividend |
| Partially Franked (50%) | 15% | $21.43 per $100 dividend |
| Unfranked | 0% | $0 |
Calculating Tax on Franked Dividends
Example: $1,000 Fully Franked Dividend
Cash dividend received: $1,000
Franking credit (30%): $1,000 x (30/70) = $428.57
Grossed-up dividend: $1,000 + $428.57 = $1,428.57
Tax at 32.5% marginal rate: $1,428.57 x 32.5% = $464.29
Less franking credit: -$428.57
Net tax payable: $35.72
Effective tax rate on dividend: only 3.6% (not 32.5%)
Franking Credit Refunds
If your tax rate is lower than the company tax rate (30%), you may receive a franking credit refund. This commonly benefits:
Get Refund If:
- Tax-free threshold earners ($0-$18,200)
- Low income earners (19% bracket)
- Retirees in pension phase
- Self-managed super funds (SMSFs)
Example: Retiree
- $1,000 franked dividend
- $428.57 franking credit
- Tax rate: 0%
- Refund: $428.57 cash!
45-Day Holding Rule
To claim franking credits over $5,000, you must hold shares "at risk" for at least 45 days (90 days for preference shares). This prevents buying shares just before dividend payment to capture franking credits.
Interest Income Tax
Interest from bank accounts, term deposits, bonds, and other fixed-income investments is fully taxable at your marginal rate. There are no special concessions like franking credits.
| Taxable Income | Marginal Rate | Tax on $5,000 Interest |
|---|---|---|
| $0 - $18,200 | 0% | $0 |
| $18,201 - $45,000 | 19% | $950 |
| $45,001 - $135,000 | 32.5% | $1,625 |
| $135,001 - $190,000 | 37% | $1,850 |
| $190,001+ | 45% | $2,250 |
Plus 2% Medicare Levy on all taxable income above $26,000.
Tax File Number (TFN) Withholding
If you don't provide your TFN to your bank, they'll withhold tax at the highest marginal rate (47%). Always provide your TFN to avoid this.
Interest from Bonds
Corporate and government bonds may pay interest that's fully taxable. However, if you buy a bond at a discount and hold to maturity, the difference may be treated as a capital gain (eligible for CGT discount if held 12+ months).
Capital Gains Tax (CGT) on Shares
When you sell shares for more than you paid, the profit is a capital gain and must be included in your tax return. CGT isn't a separate tax - it's added to your taxable income.
Calculating Capital Gain
CGT Formula
Capital Gain = Sale Price - Cost Base
Cost Base includes:
- Purchase price
- Brokerage on buy and sell
- Any incidental costs (e.g., stamp duty on some transactions)
The 50% CGT Discount
If you hold shares (or other CGT assets) for more than 12 months before selling, you only pay tax on 50% of the gain. This is one of the most valuable tax concessions for investors.
| Holding Period | CGT Discount | Tax on $10,000 Gain (32.5%) |
|---|---|---|
| Less than 12 months | None (0%) | $3,250 + Medicare |
| 12 months or more | 50% discount | $1,625 + Medicare |
Example: CGT with 50% Discount
Bought BHP shares: $20,000 (held for 18 months)
Sold for: $28,000
Capital gain: $8,000
50% CGT discount: $8,000 x 50% = $4,000
Taxable gain: $4,000
Tax at 32.5%: $1,300
Effective tax rate on gain: 16.25% (not 32.5%)
Capital Losses
Capital losses can only offset capital gains - not your salary or other income. Key points:
- Losses can be carried forward indefinitely
- You must apply losses against gains in the same year first
- Losses are applied BEFORE the 50% CGT discount
- "Wash sales" (selling and immediately rebuying) to create artificial losses are prohibited
ETF & Managed Fund Distributions
ETFs and managed funds can distribute various types of income, each taxed differently. Your annual tax statement (AMMA statement) breaks down the components.
| Distribution Type | Tax Treatment | Effective Rate |
|---|---|---|
| Franked dividends | Grossed up + franking credit offset | Reduced by credits |
| Unfranked dividends | Marginal rate | Full marginal rate |
| Interest | Marginal rate | Full marginal rate |
| CGT - discounted | 50% included at marginal rate | Half marginal rate |
| CGT - non-discounted | Marginal rate | Full marginal rate |
| Foreign income | Marginal rate + FITO offset | Reduced by foreign tax paid |
| Tax-deferred (AMIT) | Reduces cost base | Deferred until sale |
AMIT Tax-Deferred Amounts
Many Australian ETFs distribute "AMIT cost base decrease" amounts. These aren't taxed now, but they reduce your cost base. When you eventually sell, your capital gain will be higher. Keep good records!
Foreign Investment Income
Income from overseas investments is taxable in Australia. However, you may get a credit for foreign tax already paid.
Foreign Income Tax Offset (FITO)
If foreign tax is withheld on dividends or interest (e.g., US withholding tax on Apple dividends), you can claim a Foreign Income Tax Offset to avoid double taxation.
US Dividend Example
Apple dividend: US$100
US withholding tax (15% with W-8BEN): US$15
Cash received: US$85
Declare in Australia: Full US$100 (converted to AUD)
Australian tax at 32.5%: $48.75 (on AUD equivalent)
Less FITO credit: -$22.50 (on AUD equivalent)
Net Australian tax: $26.25
Important Forms for US Shares
- W-8BEN - Reduces US withholding from 30% to 15% under the tax treaty
- Submit through your broker (CMC, CommSec, etc.)
- Valid for 3 years, then needs renewal
Tax Minimization Strategies
1. Hold for 12+ Months
The 50% CGT discount is one of the most valuable tax concessions. Whenever possible, hold investments for at least 12 months before selling.
2. Invest Through Superannuation
Inside super, investment income is taxed at just 15% (or 0% in pension phase). For high-income earners, this is a massive saving.
| Investment Type | Personal (45% bracket) | In Super (accumulation) | In Super (pension) |
|---|---|---|---|
| Interest income | 47% | 15% | 0% |
| Franked dividends | ~17%* | 0% + refund | 0% + refund |
| CGT (12+ months) | 23.5% | 10% | 0% |
*After franking credits
3. Harvest Capital Losses
If you have unrealized losses, consider selling before June 30 to crystallize them and offset gains. But avoid "wash sales" - don't buy back the same shares immediately.
4. Time Your Selling
If you're retiring, on parental leave, or expect lower income next year, consider delaying sales until then to pay tax at a lower marginal rate.
5. Invest in Franked Dividend Stocks
For investors in high tax brackets, fully franked dividends provide a significant tax advantage over interest income or unfranked dividends.
Investment-Related Deductions
You can claim deductions for expenses directly related to earning investment income:
| Deductible | Not Deductible |
|---|---|
|
|
Brokerage is Not a Deduction!
Brokerage fees are not deductible in the year paid. Instead, they're added to your cost base (reducing capital gains) or subtracted from proceeds (same effect).
Related Calculators & Resources
Income Tax Calculator
Calculate tax on your total income including investments.
CGT on Shares Guide
Detailed guide to capital gains tax calculations.
Dividend Investing Strategy
Build wealth with dividend stocks in Australia.
ETF Investing Guide
Complete guide to ETF investing in Australia.
Key Takeaways
- 1. Franking credits significantly reduce tax on Australian dividends - low/no income earners may even get refunds
- 2. Interest income is fully taxed at marginal rates with no concessions
- 3. Hold shares for 12+ months to qualify for the 50% CGT discount
- 4. ETF distributions have multiple components - check your AMMA statement carefully
- 5. Submit W-8BEN to reduce US withholding tax from 30% to 15%
- 6. Investing through superannuation can dramatically reduce investment tax
Disclaimer: This guide provides general information about investment income taxation in Australia as of January 2025. Tax laws are complex and your individual circumstances may vary. This is not financial or tax advice. Please consult a qualified tax professional or financial advisor for advice specific to your situation. For official information, visit the ATO website.