Gateway Credit Union may have been one of the fastest growing banks in Australia over the last year, with a rise in loans and assets in excess of 11 per cent over the year to June 2014. Risk weighted assets ballooned 17 per cent.Net profit fell to A$1.7 million from $2.5 million, thanks to lacklustre revenue growth, higher expenses and a rise in the bad debt charge at a time of improved asset quality."At the end of the day our profit was unacceptable," Paul Thomas, Gateway CEO, said yesterday.Lower market rates, especially on deposits, and in turn wider spreads, failed to assist profit. The average interest rate paid on deposits fell 70 basis points to 3.17 per cent. The average interest rate paid on loans fell 65 bps to 5.21 per cent.Gateway's lending picked up outside New South Wales, which now accounts for less than 60 per cent of loans.  Brokers Connective and Mortgage Choice are primary sources of new business for the lender.Deposits increased only six per cent over the year, with short-term bank borrowings used to fund the asset growth.Gateway also shifted its card settlement provider from Cuscal to Australian Settlements during the year.Thomas provided a glimpse of a shift in strategy at Gateway in his weekly blog post yesterday."Financial institutions have a role to play in utilising the power of business for social good," he wrote."We are currently assessing how we can become involved in impact investing and where we should direct our efforts."