Richard Cooper, head of marketing and communications at Voca, said:
"The Voca take home pay index shows the growth rate of take home pay continues to decline. The impact of the widely predicted interest rate rise this week will be a further squeeze on household finances as mortgage interest repayments rise."
Douglas McWilliams, chief executive of cebr, the economics consultancy which analyses the take home pay index for Voca, said:
"The Retail Price Index is growing at an annual rate of 4.8 per cent in March compared to the Voca take home pay index which increased by 3.7 per cent. Inflation has now outstripped take home pay growth for the previous seven months. The implication is that a rise in workers' cost of living is exceeding growth in their wages, which drives living standards down."
Voca processes over 90 per cent of UK salaries and the Voca take home pay index is the most timely and accurate disposable income data available in the UK. It is based on actual payments made to employees on a three-month moving average compared with the same measure a year earlier. It is affected by changes in tax rates, National Insurance and other employer payments or deductions.
Voca is the provider of payment services to banks and corporates. Responsible for the technology behind the UK's automated payments, Voca has processed 60 billion transactions in the last 39 years. Voca is committed to and is actively supporting the introduction of Single Euro Payments Area (SEPA).