Joint Share Trading Accounts Explained: How They Work in Australia

This guide explains what a joint share trading account is, how ownership actually works on the ASX, the tax basics, the pros and cons, and the steps to open one. It's general information to help you weigh up whether a joint account suits your situation — not personal advice.

What is a joint share trading account?

A joint share trading account is a standard trading account owned by more than one person. With Selfwealth, a joint account can be shared by up to two individuals, who own and trade the portfolio together.

In practice it works much like an individual account — you can buy and sell ASX and international shares and ETFs — but the account, the holdings, and the linked cash account are in both names rather than one.

How does a joint share trading account work?

One account, shared access

Both holders generally have equal access. That means either person can typically deposit funds, place trades, and withdraw money. Because control is shared, it works best when both people are aligned on goals, contributions, and how decisions get made — more on that below.

Ownership on the ASX: CHESS-sponsored, one HIN, in both names

Here's the part that often gets glossed over elsewhere. When you buy Australian shares through a broker like Selfwealth, those shares are CHESS-sponsored and registered under a single Holder Identification Number (HIN) — a unique number (starting with "X") that identifies the holder on the ASX's settlement system.

For a joint account, that one HIN is registered in both names. So you and your co-holder are recorded as the direct legal and beneficial owners of the ASX shares — there's no custodian sitting in between on the Australian side. If you ever move brokers, the holdings can be transferred using your HIN.

One accuracy note so this isn't misleading: CHESS applies to ASX-listed securities only. If your joint account also trades US (NYSE/Nasdaq) or Hong Kong (HKEX) shares, those are held via a custodian, with you as the beneficial owner — that's the standard arrangement across Australian brokers offering international trading.

You can read more about how CHESS-sponsored Australian share trading works, and see the full range of account types — individual, joint, company, trust and SMSF.

Joint tenants vs tenants in common

How two people hold an asset jointly usually falls into one of two legal structures. In plain English:

• Joint tenants — you each own the whole asset together, with a "right of survivorship." If one holder dies, their interest generally passes automatically to the surviving holder.

• Tenants in common — each person owns a defined share (for example 60/40), and on death that share passes through the person's estate rather than automatically to the other holder.

Which structure applies has real consequences for tax and estate planning, so it's worth getting licensed legal advice to understand what fits your circumstances. This is general information, not legal advice.

Pros and cons of a joint share trading account

Every structure involves trade-offs. Here are the common ones.

Potential benefits

• Shared goals made simpler — pool capital toward something you're building together, like a home deposit or a family investment nest egg.

• One portfolio to track — instead of two separate accounts, you see contributions and holdings in one place.

• Both invested, literally and figuratively — shared visibility can help keep both people engaged in the plan.

Things to weigh up

• Shared control — either holder can typically trade or withdraw, so trust and clear ground rules matter.

• Tax is split — income and gains are divided between holders (see below), which adds a step at tax time.

• Life changes — separation, a dispute, or the death of a holder can complicate a jointly held account, which is why the tenancy structure and good advice matter.

Investing always carries risk, including the loss of capital — a joint account doesn't change that.

How is a joint share trading account taxed?

Tax is where joint accounts differ most from individual ones, so it's worth understanding the general principle before you start.

The Australian Taxation Office (ATO) generally assumes that jointly held shares are owned 50/50, unless the holders can demonstrate a different split based on who contributed what. Each holder then reports their share of dividends, franking credits and any capital gains in their own tax return.

A simple AUD example: say you and your co-holder own shares that pay a $1,000 fully franked dividend. If you're treated as 50/50 owners, each of you declares $500 of that dividend (plus your share of the franking credits) in your own return. If instead one person contributed 70% of the capital and that unequal ownership can be shown, the split would follow those proportions.

Because tax outcomes depend on your individual circumstances — and because getting the ownership split and record-keeping right matters — this is an area to check with a registered tax agent. The ATO (ato.gov.au) and ASIC's Moneysmart (moneysmart.gov.au) are good starting points for general guidance. Nothing here is tax advice.

Who might have a joint account suit — and who might not?

A joint share trading account tends to suit people investing toward a shared goal with someone they trust: couples building long-term wealth, family members saving together, or partners who want one combined portfolio.

It may be less suitable if you'd prefer to keep your investing separate, if only one of you will make decisions, or if your situation points to a different structure entirely. Some investors are better served by an individual account, or by a company, trust or SMSF structure — often for tax, asset-protection or estate-planning reasons that are worth discussing with a licensed adviser. You can compare the different account types Selfwealth offers to see what lines up with your plans.

How to open a joint share trading account

Opening a joint account is much like opening an individual one, with the key difference that each applicant completes the identity steps. With Selfwealth, the process is a quick online application:

1. Choose the joint account type when you apply. (Choose carefully — with Selfwealth the account type is set at application and can't be changed afterwards.)

2. Provide each person's details and verify identity — typically an Australian driver's licence or passport for each applicant (a Medicare card may be requested as additional verification).

3. Add a Tax File Number (TFN) for each holder — optional, but recommended so tax isn't withheld at the top rate.

4. Link a bank account in the same name as the trading account for withdrawals.

5. Fund the account — near-instant via Osko, or by bank transfer within 1–2 business days. You're set up with a dedicated ANZ cash trading account, with no account-keeping fees.

For the full checklist of what's required, see Selfwealth's guide on what you'll need to open an account. And because brokerage adds up over time, it's worth checking how Selfwealth's $9.50 flat fee compares to bank brokers before you commit.

Ready to invest together? You and your co-holder can open a joint account with Selfwealth and start with flat $9.50 brokerage and direct, CHESS-sponsored ownership of your ASX holdings.

Frequently asked questions

Can you have a joint share trading account in Australia? Yes. Many Australian brokers offer joint accounts. With Selfwealth, a joint share trading account can be shared by up to two people, who own and trade the portfolio together.

Who owns the shares in a joint account? Both holders do. For ASX-listed shares held through Selfwealth, the holdings are CHESS-sponsored under a single HIN registered in both names, so you're the direct legal and beneficial owners — no custodian in between on the Australian side. US and Hong Kong holdings are held via a custodian, with you as the beneficial owner.

How is a joint share trading account taxed? The ATO generally assumes jointly held shares are owned 50/50 unless a different split can be shown based on contributions. Each holder declares their share of dividends, franking credits and capital gains in their own tax return. Check with a registered tax agent for your situation.

What happens to a joint account if one holder passes away? It depends on how the account is held. Under a joint tenancy (right of survivorship), the interest generally passes to the surviving holder; as tenants in common, the deceased's share passes through their estate. Because this affects tax and estate planning, seek licensed legal advice.

Can I convert my individual account into a joint one, or add my partner? Account structures generally can't simply be switched — you'd typically open a new joint account. Moving existing holdings into it can involve a change of beneficial ownership, which may have fee and tax implications, so check Selfwealth's help centre and speak with a registered tax agent first.

How much does a joint share trading account cost? With Selfwealth, brokerage is a flat $9.50 per trade on ASX and US markets, with no account-keeping fees. You can see the full breakdown on the pricing page.