Scottish Water Charges and SMI Council Tax Exemption

How Water Charges Work in Scotland

In Scotland, water and sewerage charges are collected through your council tax bill by your local authority on behalf of Scottish Water. They appear as separate lines on your demand notice, but they're billed and collected together with council tax under Schedule 11 to the Local Government Finance Act 1992.

This collection method creates confusion whenever council tax relief is awarded. Families assume that any council tax discount or exemption automatically wipes out water charges too. Sometimes it does. Sometimes it doesn't.

Class 23 Exemption: Council Tax and Water Charges Both Go

If the dwelling qualifies for Class 23 under the Council Tax (Exempt Dwellings) (Scotland) Order 1997, council tax liability is removed. Class 23 can still apply where an SMI resident lives with an under-18 child.

A Class 23 exemption removes 100% of council tax liability. And because the property is fully exempt, statutory water and sewerage charges collected through the council tax system are also eliminated. The result is a genuine nil bill.

This applies whether the household is a single person with dementia living alone or a couple who both meet the SMI criteria.

Discounts (25% or 50%): Water Charges Are Treated Separately

When the SMI disregard produces a discount rather than a full exemption — the 25% single person discount where one person is disregarded and one chargeable adult remains, or the 50% discount where all adults are disregarded but Class 23 doesn't apply — the water charges picture changes.

The 25% or 50% reduction applies to the council tax portion of the bill. Water and sewerage charges are adjusted separately according to the statutory water charge rules and the Water Charges Reduction Scheme operated by Scottish Water.

An SMI council tax discount does not automatically reduce water charges by the same percentage. Water charges are adjusted separately under statutory water-charge rules and the Water Charges Reduction Scheme, which has its own eligibility criteria.

The Disabled Band Reduction and Water Charges

Here's a detail that catches people out: the disabled band reduction scheme drops your council tax calculation by one valuation band, but water and sewerage charges continue to be calculated on the property's original, unreduced band.

So if your Band D property gets a disability reduction to Band C for council tax purposes, you pay council tax at Band C rates but water charges at Band D rates. This isn't an error — it's how the legislation works.

What to Do After Getting Your SMI Award

Once your council processes the SMI disregard, check your revised demand notice carefully. Verify that:

• The council tax element reflects the correct discount or exemption
• Water and sewerage charges have been adjusted (or eliminated, if you received Class 23)
• If you received a partial discount, check whether you're also eligible for the Water Charges Reduction Scheme

If your revised notice still shows full water charges despite a Class 23 exemption, contact your council's revenues department immediately. The exemption should zero out both elements.

Our Scotland SMI and Disability guide includes worked financial examples showing exactly how council tax and water charges interact under each discount and exemption scenario, so you can verify your revised bill is correct.

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