Rental Income Mortgage FAQ
General information only. This is not financial advice.
Last reviewed: 2026-06-06
Can I use rental income to help me qualify for a mortgage?
Yes. Rental income from existing properties can be included in affordability assessments, but the amount counted varies. Most lenders apply a discount of 75–80% of gross rent to account for voids and costs. The income must be evidenced through tenancy agreements and bank statements showing rent credits. If rental income is your primary or sole income source, the lender pool is smaller but specialist lenders do exist.
How do lenders calculate rental income for mortgage affordability?
Most lenders use 75–80% of gross monthly rent. Some use net rental income after mortgage interest on the rental property, which can significantly reduce the usable figure. Lenders typically want at least six to twelve months of consistent rental receipts evidenced through bank statements. New lettings or projected rents without payment history are generally not accepted.
What evidence do I need to include rental income in a mortgage application?
You will typically need: the current tenancy agreement(s), six to twelve months of bank statements showing rent credits, your most recent SA302 and tax return if rental income is declared on self-assessment, and the mortgage statement for any existing mortgage on the rental property. If a letting agent manages the property, a portfolio or management statement may also be requested.
Can I use rental income as my sole income for a residential mortgage?
Some specialist lenders will consider rental income as the primary income source — for example, for portfolio landlords who no longer have employment income. These tend to be specialist or private banks rather than high-street names, and typically require a strong rental portfolio with a long track record and a larger deposit. A specialist mortgage broker is essential to identify the right lender for this scenario.
Does it matter whether the rental property has its own mortgage?
Yes. If the rental property has its own buy-to-let mortgage, lenders assessing your new residential mortgage will want to see that rental income comfortably covers existing mortgage payments — typically at an interest coverage ratio of 125–145%. Net rental income after existing mortgage costs is used in affordability for your new application, rather than gross rent.
Can rental income from a property I am about to let for the first time be included?
Generally no. Lenders want to see a track record, not projected or anticipated rent from a property not yet let. If you have a signed tenancy agreement but no payment history, some lenders may use a proportion of the projected rent — but this is a minority approach. A letting agent's market rent assessment may help in limited cases but is not universally accepted.
Risk warning
Your home may be repossessed if you do not keep up repayments on your mortgage. Rental income is subject to voids and cannot be guaranteed — lenders discount it for this reason.
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