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Annual self-assessment for landlords, in detail.

Property income is not trading income. The rules around expenses, finance costs and joint ownership trip up generic accountants every year. The articles below go through the points network firms see most often.

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Property income sits in its own corner of the tax return, with rules that look superficially like trading income but diverge in important places. The finance cost restriction (Section 24), the wear-and-tear-replaced-by-replacement-domestic-items relief, and the Form 17 joint-ownership election are three of the most consequential.

Most of the errors that get into BTL self-assessment come from one of three places: misclassifying repairs as improvements (or vice versa), miscalculating the mortgage interest tax credit, and using the default 50/50 joint ownership presumption when it does not match beneficial ownership.

The articles in this pillar work through the line-by-line rules that catch most landlords. They are useful whether you file your own return or have a firm do it: knowing what good looks like is what lets you spot what bad looks like.

Reading is one thing. Acting on it is another.

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