"During the previous financial year we took a full write-down of our holdings in Solid Energy, given the uncertainty of their future trading potential," chairman John Kelly and managing director Kevin Murphy said in their report.
"With more information being available as the Solid Energy sale process advanced, we used an independent report by KordaMentha to guide the revaluation of this debt."
The lender has been focusing on expanding its reach across the country, and Taranaki now accounts for 28 per cent of its loans and assets, compared to 33 per cent at the end of the 2015 year. Its Taranaki deposit base was steady at 49 per cent.
"Whilst growth has been achieved across the country we did experience above-market growth in the golden triangle area of Auckland, Hamilton and Tauranga with a 36 per cent increase in registered loans in this area," Kelly and Murphy said.
"This is reflective of the market conditions and is also driven by a combination of improved results from branches, an increased use of brokers, and the expansion of our mobile mortgage service to better serve customers."
TSB bought a 26 per cent stake in fund manager Fisher Funds Management for $32.8 million in 2013 and lifted that stake to 49 per cent in October last year, restructuring its ownership through the use of a new holding company, TSB Group.
The bank poured its Fisher Funds investment, valued at $36.8 million, into TSB Group, to which it advanced a $58.1 million loan.
The bank paid annual dividends of $19.85 million in the year to its shareholder, TSB Community Trust, including a $7 million special dividend which was used to increase the group's shareholding. Ordinary dividends of $12.85 million were up from $5 million a year earlier.
TSB Bank
12 months ended March 31
• $61.6 million net profit, up from $25.5 million.
• $127.8 million net interest income, up 1.7 per cent.
• $3.83 billion loan book, up 17 per cent.
• $5.81 billion deposits, up 8.3 per cent.