OK, let's have some fun.
Talking Points,
a starter for 10:
Reasons to agree: UK Parliament
1 Reduction of tax evasion by resident UK individuals with unreported US accounts (and the political 'gain' of being seen as taking action). A big one!
2 The creation of jobs at HMRC (improve unemployment figures).
3 Appease banks by eliminating threat of 30% with holding by the US on US source funds (better for the economy).
4 Government does reporting by use of agreement. (Assumes US enforces FATCA. If no agreement; all UK FI's must report to IRS without an IGA and annexes, privacy laws become an issue in future for Parliament.)
5 Those with a US reportable UK account are required to do so under existing US law.
6 Those with a UK reportable US account are required to do so under existing UK law (those who are resident in the UK and file on the arising basis).
7 The UK gains respect for being a leading player on the global crackdown of international tax evasion.
8 If the reference to Chapter 3 of subtitle A of the Internal Revenue Code (as I read it
) includes all US source income that would be subject to reporting on a 1040NR, then the agreement is not totally one sided in favour of the US.
Reasons to disagree: UK Parliament
1 The creation of jobs at HMRC (UK Budget can not support the additional cost).
2 Cost of implementation for UK banks with US Reporting obligations. This is becoming less of a vocal argument from the UK banks, or perhaps they're just giving in, and hope to make the best (or the most profit available) from an inevitable situation.
3 Cost to the UK public at large in fees or reduced interest as banks seek to reclaim the costs associated with FATCA.
4 Increased cost to HMRC in collecting, sorting, and forwarding data, but will be countered by arguments that revenue will increase to cover these costs (the popular US argument).
5 Circumvention of privacy laws.
6 The reciprocal data for 'UK Persons' does not exist today in the US, and there are no guarantees that it will be available in the future (US Congressional actions).
7 'Unaware UKC's that are also USC's' (low value/high value accounts) will be tossed to the lions without a reasonable IRS programme to solve their lack of US compliance problems, and the economic consequences for the individual.
8 HMRC receives data on all UK accounts of UK residents (including tax free accounts). With respect to UK accounts for those resident in the UK, there
(should be) a low risk of tax evasion. (US would argue that US tax evasion might be a consideration, given the right circumstances, for those with US reporting obligations, even though the UK will collect at higher tax rates. It's hard to argue against this given the large number of UK tax free options,
and ISAs are exempt from reporting* .)
9 Will it be a true peer to peer endeavor?
Consequences for the USC resident in the UK:
Positive:
1 Ahh....Mmmm....well, the warm feeling from knowing that international tax evasion is being reduced.
Negative:
1 Parliament has no reason to be of concern where a long term resident of the US, now resident in the UK, is delinquent in their IRS compliance.
2 Threat of the reduction in banking options may still arise for 'US Persons', or fees attributable to FATCA may increase the cost of US Person accounts, or reduce income. (I personally don't think the discrimination argument is substantial, and can be circumvented.)
Open to all comments (and rejections) from "I couldn't care a toss", to "unfortunately under Title 26....", to "It's American exceptionalistic Imperialism". If, even with the agreement, a threat remains for US Persons to lose some current banking options or profits, perhaps Weller is right. Weller might be right on the general principles alone. No one in the wider UK public understands the situation better than those on this site. Perhaps some may want to speak up if so inclined. But, be careful, a USC resident in the UK objecting to a US tax agreement may be viewed as having ulterior motives. Any arguments must be substantial from a UK perspective. A real catch 22.
IMHO (cynic), money will always seek ways and places to grow. There must be some bright spark in some rouge state figuring ways around global reporting.
Sorry for the length!
EDIT:
* An ISA is still a reporting requirement for a USC on their US 1040 return. It's not reportable (exempt) for an FI for the purposes of reporting to the US by the agreement. (IMHO. I could be wrong.)