Pensions and child benefit

Shankers

Hi all
I've become an accidental landlord. Rental and salaried income now £58k approx.
Already paying about £5000 p/a into a workplace pension (net pay arrangement).
Allowable expenses for the property are around £1.5k p.a for this tax year so far. 
This still leaves me around £3k to reduce for ANI. 
Not sure I'll keep the property more than another couple of years so I'm not keen on upping the % of my workplace contributions, so I'm looking for something more flexible. My question is whether a SIPP counts towards lowering my Adjusted Net Income.
In my mind (and from my understanding): my situation is this:
Salary (£52k) + rental income (£6k)  = £58k
£58k - workplace pension (£5000) and  allowable expenses (£1.5k) = £51.5k
If I make a £900 SIPP contribution before this tax year ends, would this be grossed-up to £1.5k, therefore taking my Adjusted Net Income to £50k and therefore preventing me losing out on any child benefit?

Dazed_and_C0nfused

Answered on your other post.

zagfles

No, because SIPP providers don't know your tax rate and will only ever claim basic rate relief. So if you want to contribute £1500 gross you need to pay in £1200 net. SIPP provider will claim £300 tax relief, and you can claim higher rate relief from HMRC (gross cont of £1500 will increase your basic rate band by £1500). It will also reduce your ANI by £1500 so if ANI is then £50k or less there is no child ben clawback. You need to include interest & dividends in ANI even if they are covered by the savings/dividend allowance.