You don't have to buy a SWMS. You can write your own, and plenty of tradies do. It isn't complicated, but doing it properly takes a bit of time and you need to actually know the work. Here's the method.
What do you need before writing a SWMS?
Two things make a SWMS good: someone who knows the task (usually the person doing it), and a bit of time to think it through. Get the workers who do the job involved. They know where it bites, and a SWMS written at a desk by someone who's never done the work shows.
It also helps to know what a SWMS is meant to do first. If you're new to it, read what goes in a SWMS and the high-risk construction work list so you know when one's required.
How do you write a SWMS, step by step?
A SWMS is really just three questions: what's the job, what can hurt someone, and how are you stopping it. Work through it in order.
1. Describe the work
Write down the high-risk work you're doing, and be specific. "Excavation" is too broad. "Trenching to 1.8m for stormwater near a live gas main" tells the story and points you at the real hazards.
2. Break the job into steps
List the job from start to finish, in the order you'll actually do it. Set up, dig, shore, lay the pipe, backfill, clean up. Keeping the steps in real order stops you missing anything.
3. Find the hazards in each step
For every step, ask what could go wrong. Cave-in, hitting an underground service, plant swinging into someone, manual handling. Don't skip the boring ones. The everyday stuff is what actually hurts people.
4. Set the controls
For each hazard, spell out how you're controlling it, and work down the hierarchy of controls. Can you get rid of the hazard altogether? If not, can you swap it for something safer, isolate it behind a barrier, or engineer the risk out? Procedures and training come after that, and PPE is the last line, not the first. If your only control is "wear hi-vis and be careful", it'll get knocked back.
5. Note the gear, permits and people
List the plant, tickets, licences, permits and PPE the job needs. Then say who's responsible for what, so it's clear on the day.
6. Get the legislation right for your state
Reference the Act, regulator and codes for the state where the work is happening. NSW isn't the same as Victoria. Get this wrong and a head contractor will pick it in about ten seconds. See SWMS requirements by state.
7. Consult the crew and sign on
Walk the workers through it before the job starts and get them to sign. That isn't a box-tick. Talking through the SWMS on site is how it actually does its job.
8. Review it when things change
If the job changes, the site changes, or something goes wrong, update the SWMS. A document that no longer matches the work isn't much use to anyone.
How do you rate risk in a SWMS?
Listing a hazard is only half of it. You also rate how bad it could realistically be (the consequence) and how likely it is to happen (the likelihood). Where those two meet on the matrix gives you a risk level. Then you add your controls and rate it again to check they've actually pulled the risk down. That second, lower score is the residual risk, and it's what tells you the job's safe to do.
| Likelihood ↓ / Consequence → | Insignificant | Minor | Moderate | Major | Severe |
|---|---|---|---|---|---|
| Almost certain | M | H | H | E | E |
| Likely | M | M | H | H | E |
| Possible | L | M | M | H | E |
| Unlikely | L | L | M | M | H |
| Rare | L | L | L | M | H |
L = Low, M = Medium, H = High, E = Extreme. This is an example of a common 5×5 matrix. There's no single legal one, so your business sets its own likelihood and consequence criteria.
What each level means once you land on it:
Acceptable. Manage it with your normal procedures and keep an eye on it.
Put specific controls in place and monitor it. Don't just wave it through.
Controls need to be in place and signed off before the work starts, with someone senior across it.
Stop. Don't do the work until you've changed how it's done and brought the risk down.
Why do SWMS get knocked back on site?
Most rejected SWMS trip on the same few things:
- Too generic, not specific to the actual task or site
- Controls that lean on PPE or "be careful" instead of real controls
- Missing hazards, or whole high-risk activities left out
- The wrong state's legislation, or none at all
- No sign-on and no evidence the crew was consulted
Should you write a SWMS from scratch or start from a template?
Writing one SWMS from scratch is doable, and if you've only got a task or two, go for it. Writing one for every job your trade does, properly, for your state, and keeping them current, is a lot of nights at the kitchen table.
That's the reason most tradies start from a template instead. The hazards, controls and legislation are already drafted by someone who does this for a living, and written for your state, so you're editing and adding your site details rather than staring at a blank page. Both ways get you a real SWMS. One just saves you the hours. If that's the way you'd rather go, browse trade packs or an individual SWMS.
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This guide is general information, not legal or safety advice, and does not guarantee compliance. Laws and site conditions vary, so always check your state regulator and have documents reviewed by a competent person.