In many cases the conversion of a loan to shares is not a share reorganisation because the shares:
If the share issue does not amount to a share reorganisation,
TCGA92/S251 (3) will apply to establish the allowable cost of the
shares. This will be their market value at the time of issue, see
CG53510 onwards. That value should normally be agreed by Shares
Valuation, see CG59540 onwards.
Example
As the shares were not issued to Mrs H in proportion to an
existing holding of shares she had in X Ltd, the transaction does
not amount to a share reorganisation. Mrs H will acquire the shares
in X Ltd at their market value on the date of issue,
TCGA92/S251(3). You should normally ask Shares Valuation to agree
the value of the shares when they were issued as this (not
necessarily £60,000) will be the amount deductible in
calculating Mrs H’s allowable loss.
If Mrs H had sold the shares immediately after they were
issued it may be possible to argue that there is unlikely to have
been any change in their value overnight. Therefore, there is no
loss on their disposal. But if you approach a case along these
lines you must make it clear that you are
not actually seeking to agree the value of the
shares, since that is something only Shares Valuation can do.