Capital Gains tax calculator for US based shares including multiple buys over several tax years.

Slammeddeluxe

Hi 

Does anyone know of an online calculator that will allow me to calculate capital gains made in US stocks over this last tax year ? Multiple buys not over long term with a large sale at the end. And also multiple standard buys with mirror sales. Issues involve £ v $ rates and mutliple tax years. My accountant hasnt got a clue. Thanks 

theinbetweener007

Why does it matter if your purchased over multiple years matter?

i would have thought that any capital gains realised this year is what the tax woman is interested in. 

I would also think its just the profit in today’s money that is relevant above and beyond your yearly cgt allowance? 

wmb194

theinbetweener007 said:

Why does it matter if your purchased over multiple years matter?

i would have thought that any capital gains realised this year is what the tax woman is interested in. 

I would also think its just the profit in today’s money that is relevant above and beyond your yearly cgt allowance? 

You need to account for the exchange rate at the time of purchase and sale. The more transactions there are the more complicated it becomes, and it sounds like the OP has a lot of transactions. Over multiple years with sales mixed with purchases, the 30 day rule can be an issue, too.

ColdIron

theinbetweener007 said:

Why does it matter if your purchased over multiple years matter?

Because they will have been bought at different prices and you need to establish a weighted average cost per share

i would have thought that any capital gains realised this year is what the tax woman is interested in.

That's right, the gains occur when you sell them. But how do you know what your gain is unless you know what they cost you? (see above)

I would also think its just the profit in today’s money that is relevant above and beyond your yearly cgt allowance?

The gain is the amount realised on sale (this year's money) minus the cost of acquisition for every purchase (previous year's money) outside of the Annual Exempt Amount (the CGT allowance)

And then on top of all this you need to factor in the exchange rates for every purchase and disposal