A final dividend of 7.5c per share was declared, taking the total for the year to 14.25cps, compared to 14cps the year before.
Electricity revenue and earnings before interest, tax, depreciation and amortisation (ebitda) rose due to good growth in volume despite unseasonably warmer temperatures in May and June.
Revenue improved 3.6 per cent to $574m, and ebitda was up 2.5 per cent to $364.6m.
Connections grew 0.8 per cent to 532,607, with 4362 new customers joining the networks.
Gas transportation revenue rose 5.6 percent to $205.1m, reflecting an increased contribution from gas transmission where volume grew 9.5 percent due mostly to a full year's contribution from the Kupe field.
Growth in new gas distribution connections improved 3 percent, and total customer numbers ended the year at 155,100 up 1.9 percent on 2010.
Ebitda declined 1.5 per cent to $157.3m reflecting higher cost of sales and a debt write-off.
Vector chief executive Simon Mackenzie said the company invested $257m in the business during the year, including $156m on electricity and gas infrastructure.
- NZPA