Net profit reported by The Rock Building Society was up 21 per cent to $4.48 million for financial year 2008, at the high end of the $4.2 to $4.5 million guidance reaffirmed at the February interim results.Revenue increased 18 per cent to $98.5 million, with net tangible assets backing per share up 21 cents to $2.50 - with net assets $48 million, up from $43.8 million.The lending book grew at a sub-system nine per cent to $1.17 billion, with arrears over 30 days less than one per cent of the lending portfolio.A four per cent drop in retail deposits for the year to $499 million was disappointing, with 72 per cent of the portfolio domiciled in Central Queensland, twelve per cent in the rest of Queensland and 16 per cent in the rest of Australia.A final dividend of 10.5 cents was declared, bringing the FY08 total to 20.5 cents, 2.5 cents higher than the previous year.Shares remained untraded yesterday, with the last trade at $3.00. Twelve-month highs are $5.25 and lows $2.79, with a market capitalisation of $58 million.