by Ray Coman on Sat Mar 13, 2010 4:21 pm
Regarding your rental income, you should declare this to HM Revenue & Customs. Costs can be deducted from rental profits subject to tax. You have not indicated whether the BTL property is mortgaged. If so, interest on this property can be deducted. For tax purposes, you would be well served to consider re-financing since you cannot get tax relief on the mortgage interest on the home that you live in.
You will face a penalty for late filing of a Tax Return, however the penalty will be reduced to the lower of the fixed penalty (or tax geared penalty) and the actual tax liability. If your costs are high then the liability will be low. The liability for 2007-08 is not likely to be as high, since the property was only let for 3 months. Note that rental income of this sort is not subject to national insurance.
Regarding PPR, as already noted, HMRC is likely to deny relief unless the property was genuinely being used as a main residence. If your own correspondence (including correspondence from HMRC) was never sent to the property once a BLT then this will be hard to support.
PPR may be an irrelevant consideration since if the total of your gains for the tax year are less than your annual exemption (£10,100 for 2009/10), then you you would not be liable to CGT on any gain related to the business property anyway.
I hope this helps.