Do You Need Custom Orthotics, or Will Shop-Bought Flat Foot Insoles Do?

What is the difference between custom orthotics and shop-bought insoles?

Shop-bought insoles are pre-made arch support insoles designed to fit a range of foot shapes. You choose a size, slip them into your shoes, and they cushion or support your arch immediately. They suit many people with mild flat feet or general foot fatigue.

Custom orthotics, sometimes called prescription orthotics, are made from a mould or 3D foot scan of your individual foot. A podiatrist assesses your gait, arch height, and the way your foot loads weight, then designs an orthotic shaped to correct your specific biomechanics. The device typically includes features like a heel post or targeted pronation control that a generic insole does not offer.

The cost of custom orthotics is considerably higher than off-the-shelf options. That investment makes sense when your foot mechanics genuinely need it, but for many people a well-chosen pair of shop-bought insoles does the job perfectly well.

How do you know if shop-bought insoles are not enough?

A shop-bought insole stops being enough when your symptoms persist despite wearing good arch support insoles consistently. Here are the common signs that you may need a more tailored approach.

Are custom orthotics worth it compared to off-the-shelf insoles?

Custom orthotics are worth the investment when there is a clear structural reason for them, confirmed by a professional assessment. Without that confirmation, you could spend hundreds of pounds on a device that addresses the wrong problem.

Here is the key question most people miss. If your pain is actually caused by a pelvic tilt, a hip alignment issue, or an imbalance further up the body, even the most perfectly shaped custom orthotic will not fix the root cause. The foot may be compensating for a problem above it.

How does standing imaging help decide between insoles and custom orthotics?

A standing, weight-bearing image captures your skeleton under real load, from your feet to your head, in the position where symptoms actually occur. This matters because lying-down imaging (standard X-ray, CT, MRI) relaxes the muscles and can hide alignment problems that only appear when you are upright and gravity is acting on your joints.

Your body is a connected chain. A flat foot can roll the ankle inward, which tilts the knee, which shifts the pelvis, which curves the spine. Pain often shows up far away from its true cause. ScanAlign standing imaging captures this entire chain in a single low-dose scan, using about 90% less radiation than a standard X-ray, around ten times less.

With this full picture, you and your podiatrist can see exactly where the misalignment starts and whether custom orthotics will target the right level. Without it, you might correct the foot while the real driver sits at the hip.

When should you try shop-bought insoles and when should you go custom?

The decision is simpler than it seems. Start with what your symptoms and history tell you.

If you are a podiatrist or physiotherapist who would like to refer a patient for standing alignment imaging before prescribing orthotics, see our information for referring podiatrists.

Frequently asked questions about flat foot insoles and custom orthotics