New Zealand businesses should prepare themselves for a rise in the official cash rate, which some experts believe could happen within the next couple of months. Reserve Bank governor Graeme Wheeler announced yesterday (January 30) that the rate would remain unchanged at 2.5 per cent - but commentators anticipate this will soon change. Mr Wheeler acknowledged the "considerable momentum" gained by economic expansion over recent months, while export commodity prices remain very high. This comes at a time when business and consumer confidence are high and net inward migration has experienced strong growth. The governor even acknowledged himself that some policy changes could start to take effect in the near future: "While headline inflation has been moderate, inflationary pressures are expected to increase over the next two years. "In this environment, there is a need to return interest rates to more-normal levels. The bank expects to start this adjustment soon." A number of economists were asked by TVNZ what they think will happen with the official cash rate - and many believe a rise will be on the cards in the not-too-distant future. Bernard Hickey, business commentator from hivenews.co.nz, said: "Put it in your calendar, interest rates are going up on March 13." His sentiments were echoed by ANZ chief economist Cameron Bagrie, who anticipates a rise in the official cash rate to a "more neutral or average level". With unemployment falling and inflation going up, this would be the most appropriate action for the bank to take, the expert noted. Those operating accounting software for small business will need to be aware of any changes, as they have the potential to affect day-to-day operations. The Reserve Bank of New Zealand acknowledged that any rise in the official cash rate will be largely dependent on future economic indicators.