Ambitious ASX-listed mutual bank Goldfields Money Limited has pointed to its half-year results for 2018/19 as proof that a merger last year with mortgage aggregator Finsure has already proved a success. Statutory net after-tax profit for the combined entity was A$0.67 million, up 980 per cent on 1H18, heartening news for a former small mutual that is finding its feet as a newly launched digital bank for individual and business customers.The merger - finalised on 17 September last year - was contentious on many levels, not the least because the WA mutual bank was coveted by Queensland based non-bank lender Firstmac and a short bidding war with Finsure ensued.The deal with Finsure itself was voted against by a sizable minority of Goldfields shareholders (around 12 million votes in favour, 5.5 million votes against).Fast forward to its performance for the six months ended 31 December 2018, which comprises the full six months of Goldfields Money's operations, boosted by the consolidation of Finsure from 17 of September 2018. The Group has generated statutory net revenue of $11.4 million for the half year or $13.7 million on a proforma basis, compared to $13.5 million on a proforma basis in 1H18. During the period, GMY grew its on-balance sheet loan book by a net amount of $11 million (through $22 million in settlements for the half) to report a balance of $176 million.Banking net interest income was $1.64 million, up 2 per cent from 1H18. As at 31 December 2018, the Groups' funding mix towards transactional deposit accounts was 24 per cent, up 33 per cent, compared to the FY18 position.  As a result, the division delivered a strong margin performance, with NIM of 2.00 per cent. This was a step in right direction, with total loan settlements up 11 per cent over the comparable half last year, to $6.8 billion for the group. The bank aims to keep re-inventing itself on several levels - including the use of digital technology to widen its customer base - while it continues to integrate the Finsure broker network and move towards a full service offering.The group also has plans to rebrand as BNK Bank during the second half of its 2018/19 year.