Increase Cash Flow. Increase Profits. Increase Wealth. Decrease Tax. Decrease Worry. Management advice and accounting and taxation services to individuals and businesses of all sizes throughout Christchurch and New Zealand. Nexia is large enough to provide the expertise you need, but small enough to provide personal service. Our aim is to provide you with a professional accounting service at an affordable price. Nexia provides Accounting, Information Technology, Audit and Human Resource Services - allowing you to concentrate on what you do best.