Foxy - I have made 3 lump payments into my Flexiplan AVC over the last 3 tax years, all of them paid gross (as there is no alternative with RM - unlike my SIPP) Each time I have received the relevant certificate provided by RM Pensions in confirmation that I have subsequently sent to HMRC.
The first time I did it - no response whatsoever. I rang HMRC and entered their telephone labyrinth and was promised a response that never actually materialised. Having already been registered for the Government Gateway service to get online access to my State Pension forecast, I decided to set up a Personal tax account under the same Gateway service. Once I received confirmation it was set up, I then complained about the absence of a response to my first lump sum AVC and got a quick response online and a reasonable timescale for a resolution.
For the second and third lump sum AVC’s, I entered the details into my Personal tax account first and also sent HMRC the relevant certificates from RM through the post. In both cases, my PAYE Notice of Coding was amended within a fortnight and my subsequent taxable pay reduced accordingly !
For anyone interested in setting up a Personal tax account with HMRC and the services it provides, here is the link
https://www.gov.uk/personal-tax-account" onclick="window.open(this.href);return false;
Caution ! - HMRC Personal tax account is not perfect as it is a relatively newish service but still better than being held in a call queue and eventually being connected to an operator who knows less about pensions and tax that you do ! They are really not that bright - struggle to understand difference between lump sum payments into AVC’s and Annuities.
If you have made lump sum AVC then your tax code should be adjusted to reflect the gross lump sum contribution that you made. There is a timing issue here, as we approach the end of the current tax year but you should get the tax relief back either this year or next depending on when HMRC get around to processing it. Chances are you will get it in the next tax year as HMRC can hold on to your tax relief longer and spread the ‘rebate’ over 12 months !
A laboured explanation I know, but based on my recent experience.