Most families don’t really have an “investment plan” in the formal sense. Money gets invested when there’s spare cash, paused when life gets busy and adjusted depending on what’s happening in the news or at home. That’s not unusual – it’s just how life works.
But over time, it can lead to a bit of a pattern: stop-start investing, mixed priorities, a lack of clear goals and the same money conversations popping up again and again.
A simple family investment plan helps smooth that out. Despite the name, it doesn’t need to be formal or complicated. Think of it as a one-page note in plain English that answers two questions:
- What are we trying to do with our money?
- And how are we going to stick to that when things get noisy?
You might hear this called an “investment policy statement”. Sounds serious, but in practice it’s just a written agreement that helps you make calmer decisions over time.
The goal isn’t to predict markets or build the perfect portfolio. It’s much simpler than that: decide what you’ll do before emotions, headlines or competing priorities do it for you.
What is a family investment plan?
Think of it like a road trip plan. You don’t map every turn in advance, but you do agree on where you’re going, roughly how you’ll get there and what you’ll do if traffic gets bad.
A good family investment plan usually covers:
- What you’re investing for
- How long you’re investing for (ideally)
- How much you’ll contribute (and how often)
- How much cash you want as a buffer
- What you’re comfortable investing in
- How you’ll split money between competing goals
- What you’ll do (and won’t do) when markets fall
- When you’ll sit down and review things
That’s it. No jargon. No 20-page document. Just something you can actually refer back to.
Why bother writing it down?
When things are calm, it feels easy to say, “We’ve got this sorted.” But most money tension doesn’t show up in calm moments. Instead, it shows up when:
- One of you wants to invest more, the other wants to pay down the mortgage
- One wants to invest in a particular share or ETF, the other has different ideas
- One of you is fine with market ups and downs, the other isn’t
- One prefers cash safety, the other prefers getting money invested
None of that is wrong – it just needs to be talked through. Writing it down helps you do that once, properly, instead of re-hashing it every few months.
It also helps when markets drop. Because they will. And in those moments, it’s surprisingly easy to forget what you agreed on when everything felt fine. A written plan gives you something steady to come back to. It doesn’t remove uncertainty, but stops every decision feeling like a fresh debate.
Start with goals, not products
Before you think about ETFs, super, shares or account types, zoom out a bit. Ask yourselves, what is this money actually for?
Common answers include:
- Retirement
- Building wealth outside super
- More flexibility with work
- Future kids’ expenses
- Buying a home
- Upgrading a home
- Having a financial buffer
You don’t need identical financial goals as a couple. In fact, you often won’t have them. One person might care more about super, while the other might care more about accessible investments. That’s normal. Start with the “why”, then figure out the “how”.
Get the big trade-offs on the table
Most households aren’t choosing between investing and not investing. They’re deciding how to split money across different priorities, like:
- Emergency fund
- Offset account
- Mortgage repayments
- Super contributions
- Investing outside super
- Saving or investing for kids
This is where the classic question – “Should we pay off the mortgage or invest?” – gets more realistic. Because different buckets do different jobs:
- Emergency fund = “something goes wrong right now”
- Offset = flexible interest savings
- Super = long-term retirement savings (with rules)
- Investing outside super = flexibility + growth potential
You don’t always have to pick one winner. Rather, a better question is: What job is each bucket doing in our plan?
Talk about risk in normal language
“Risk tolerance” sounds like something you need a finance degree to understand, but it’s really just about how you’ll feel if your investments go up or down. If a 15-20% drop would make one of you want to sell everything, that matters. If the money won’t be needed for 20 years, that matters too. And it’s also completely normal for partners to feel differently.
Instead of only asking “how much return do we want?”, try questions like:
- What is this money for?
- When do we actually need it?
- How would we feel if it dropped sharply?
- Would we still stick with the investment plan?
- What would make us change our mind?
The goal isn’t to take on as much risk as possible, but to find something you can both live with, especially when things get uncomfortable. Because a “perfect” strategy you abandon in a downturn isn’t really a strategy at all.
Set the rules, then write them down
Once you’ve talked through goals and priorities, turn them into a few simple rules. You don’t necessarily have to follow them perfectly, but they’ll at least give you some kind of framework to work with.
A simple one-page plan might include:
- Short, medium and long-term goals
- Your emergency fund target
- How much you invest and how often
- Your general investment approach
- Your risk tolerance
- What you’ll do during market drops (and what you won’t do)
- How you’ll handle windfalls and lump sums (bonuses, inheritances, etc.)
- How super fits into the picture
- Whether and how you invest for kids
- How often you’ll review the plan
- Anything that needs professional advice (tax, trusts, estate planning)
What this could look like in practice
Sarah (34) is a teacher and Liam (36) works in IT. They live in Brisbane with their two-year-old daughter. Together they earn about $165,000, have $22,000 in savings, a mortgage with an offset, $140,000 in super and an $18,000 ETF portfolio in Sarah’s name.
Sarah wants to invest more regularly but Liam prefers focusing on the mortgage. They also want to set something aside for their daughter, but aren’t sure how. So, they sit down one Sunday and actually talk it through properly.
They land on three shared goals:
- A comfortable retirement
- Building wealth outside super
- Setting money aside for their daughter’s future
Instead of choosing just one, they decide to structure all three.
Then they talk honestly about risk. The real concern isn’t day-to-day market movement, but needing the money at the wrong time. So, they set a few simple rules:
- Keep a $20,000 emergency buffer
- Continue mortgage repayments
- Invest $1,000 a month consistently
- Review super once a year
- Don’t react to market headlines
- Get advice before investing directly in their daughter’s name
Before this, investing felt a bit inconsistent and the conversations kept looping. Now there’s a plan, a rhythm and a shared understanding of why things are set up the way they are.
What else belongs in the plan?
Some decisions are worth being explicit about.
Ownership and structure
Individual accounts are simple. Joint accounts are shared. Trusts can offer flexibility but also add cost, admin and complexity.
There’s no single “best” option. It depends on tax, control, purpose and your family situation. This is often where professional advice is helpful.
Super
Super is usually one of your biggest assets, so it deserves a place in the plan, even if it feels out of sight.
It’s not about whether super is “better” than investing outside it. It’s about:
- When you’ll need the money
- How it’s taxed
- When you can access it
- How it fits alongside everything else
Investing for kids
Investing for a child isn’t always the same as investing in their name. Tax rules for minors are different, and ownership matters a lot. Before setting anything up, be clear on:
- Who legally owns the money
- Who controls it
- When the child gets access
Where the plan actually gets tested
The real value shows up when life gets messy:
- Markets fall? You follow the plan instead of reacting.
- Job loss? You pause contributions, use your emergency buffer and reassess calmly.
- New baby or windfall? You adjust using the same framework instead of starting from scratch.
The point isn’t rigidity, it’s just about making fewer emotional decisions when things change.
(And this isn’t personal financial advice. Everyone’s situation is different, and some decisions are best made with professional help.)
You can do this in an hour
You don’t need spreadsheets or a weekend workshop. Just set aside an hour and:
- Talk through your financial goals (together and individually)
- List your current financial position
- Decide how money is split across priorities
- Agree on contributions and investing approach
- Set simple rules for market downturns
- Write it down on one page
- Pick a time to review it each year
Then leave it alone, unless something big changes. You don’t need to get it perfect. The main thing is to agree on what you’re trying to do, decide how you’ll handle the big stuff and write it down so you’re not having the same conversation every time something changes.
