Void Period Cost Calculator
A void period — when a rental property is empty between tenants — is one of the most costly events in a landlord's calendar. During a void, rental income stops but most fixed costs continue: mortgage payments, insurance, council tax (often payable by the landlord for empty properties), and possibly standing charges. Smart landlords budget for voids in advance rather than being caught off guard.
Why this matters
Even one extra month of void per year on a £1,000/month property costs £12,000 in lost income over a decade — more than most landlords spend on maintenance. Void risk is underpriced in most return calculations.
Key points
- Average void period in England is 3–4 weeks between tenancies
- During a void, landlords typically pay council tax on the property after a 1-month exemption
- Mortgage payments continue regardless of tenancy status
- Insurance may have void restrictions — check your policy for properties empty beyond 30 days
- Good letting agents typically achieve lower void periods through proactive re-marketing
- Student lets and HMOs can have predictable annual void windows tied to the academic year
Frequently asked questions
Who pays council tax when a property is empty?
The landlord is liable for council tax on an empty property. Most councils offer a short exempt period (typically 1 month) for genuinely empty unfurnished properties. After this, the full council tax bill applies — sometimes with a premium for long-term empty properties.
How can I minimise void periods?
Start remarketing 4–6 weeks before the current tenancy ends. Price the property correctly for the market. Keep the property well-maintained. Consider allowing pets — it significantly widens the pool of potential tenants. Choose tenants likely to stay long-term.
Is void period income covered by landlord insurance?
Some specialist landlord insurance policies include rent guarantee insurance that covers rental income during a void caused by a specific event (e.g. tenant insolvency, legal dispute). It does not cover normal void periods between tenancies. Rent guarantee is a separate add-on product.
How long can a property be empty before it affects my mortgage?
Most buy-to-let mortgage lenders allow properties to be unoccupied for up to 30–60 days without notifying them. Longer voids may technically breach mortgage conditions. Check your mortgage terms and notify your lender and insurer for extended voids.