How Often Should You Replace Your Mattress? (Australian Guide)

The general advice you'll see repeated everywhere is 'replace your mattress every 7–10 years.' But this is a generalisation, and the reality is more nuanced. Some people are sleeping on 15-year-old mattresses that are still perfectly comfortable. Others need a new mattress after five years. The right answer depends on the quality of your original mattress, how well you've cared for it, your body weight, and — most importantly — how well you're sleeping on it.

This guide covers when to replace your mattress, the signs that indicate it's time, and how to extend the lifespan of your current mattress.

The General Rule: 7–10 Years

The 7–10 year guideline exists because most mattresses — even good-quality ones — experience significant material degradation within this timeframe. Foam softens and develops permanent impressions. Spring tension weakens. Coil support diminishes. Even if the mattress doesn't feel dramatically different, it's likely providing less support than when new.

However, this is an average. Premium foam mattresses and high-quality pocket spring mattresses can last 10–12 years with good care. Budget mattresses may need replacing in 4–5 years.

Signs You Need to Replace Your Mattress Now

You Wake Up with Pain

If you regularly wake with back pain, shoulder pain, or hip discomfort that improves once you've been up for an hour or two, your mattress is a likely culprit. A mattress that's no longer supporting your body correctly creates muscular strain and pressure points that manifest as morning pain.

Visible Sagging or Body Impressions

Run your hand across the surface of your mattress. If you can see or feel significant impressions deeper than 3–4cm in your sleeping area, the foam or spring support has deteriorated. Most mattress warranties void for body impressions under a certain depth (often 3–4cm) — anything above this is generally considered defective.

Noisy Springs

Squeaking or creaking from your mattress when you move indicates that the coil system has degraded. Worn springs are also likely providing less support and more pressure points.

You Sleep Better Elsewhere

If you regularly sleep better in hotels, at friends' houses, or anywhere other than your own bed, your mattress is the most likely explanation. Pay attention to this — it's a telling indicator.

Increased Allergies or Asthma

Over time, mattresses accumulate dust mites, dead skin cells, and allergens. If your allergies or asthma symptoms have worsened, particularly overnight, a mattress beyond 8–10 years is a potential contributor.

Visible Wear or Damage

Lumps, tears in the cover, staining, or visible damage to the mattress surface are signs that replacement should be considered.

Factors That Affect How Long a Mattress Lasts

Mattress Quality

Higher-quality mattresses with denser foam and stronger coil systems last significantly longer than budget options. A $400 foam mattress might last 5 years; a $1,400 premium foam mattress can last 10–12 years.

Body Weight

Heavier sleepers put more pressure on mattress materials, accelerating degradation. A mattress that lasts 10 years for an 80kg sleeper might need replacement in 6–7 years for a 120kg sleeper.

How Well You Maintain It

Regular rotation (every 3–6 months), using a mattress protector, proper base/foundation support, and keeping the mattress clean all extend lifespan.

Usage Patterns

A mattress used only in a guest room for 20 nights per year will last far longer than one that's slept on every night.

How to Extend Your Mattress Lifespan

• Use a quality mattress protector — protects against moisture, spills, and dust mites

• Rotate your mattress every 3–6 months (head to foot) — prevents uneven wear

• Ensure your bed base provides proper support — slats should be no more than 6cm apart

• Keep children and pets from jumping on the mattress — concentrated impact damages foam and springs

• Clean your mattress regularly — vacuum it and treat stains promptly

When NOT to Wait

Don't wait until your mattress is falling apart if you're experiencing sleep problems. The cost of consistently poor sleep — on health, productivity, and mood — outweighs the cost of a new mattress. If your mattress is over 7 years old and you're not sleeping well, it's worth investing in a replacement even if the mattress doesn't look visibly damaged.

Our Verdict

Use 7–10 years as a guideline, not a rule. If you're sleeping poorly, waking with pain, or noticing visible sagging and you've had your mattress for 5+ years, it's time to consider a replacement. If your 10-year-old mattress is still comfortable and you're sleeping well, don't rush the decision. The signs above are better indicators than any arbitrary number.

Our Top Picks

Quick Comparison Table

Buying Guide: What to Look for in an Australian Mattress

1. Trial Period

Always look for at least 100 nights. Koala (120 nights) and Sleeping Duck (100 nights) offer some of the best trials available. A trial lets you test the mattress through different seasons including Australian summer.

2. Warranty

A 10-year warranty is standard for quality mattresses. Ecosa offers 15 years, which is exceptional. Be wary of brands offering less than 5 years.

3. Foam vs Hybrid

All-foam mattresses offer excellent motion isolation but can sleep warm. Hybrid mattresses use pocket springs under foam, improving airflow significantly — important for Australian summers.

4. Firmness

Medium is most versatile for side and back sleepers. Stomach sleepers generally need firmer. If unsure, Ecosa lets you adjust firmness.