The latest round of invoice payment data analysis by Dun & Bradstreet has shown business-to-business payment times slowing to an average of 56 days during the first quarter of 2014, the lowest rate in three years. According to D&B, businesses waited, on average, three days longer than in the previous quarter to pay each other and two days longer than a year earlier, in a sign that business finances may be under strain. In addition, one in three (34 per cent) businesses told D&B they had a supplier or customer last year that became insolvent or was otherwise unable to pay them.The credit reference agency said these findings build on its latest business expectations survey, which found that a quarter of businesses (26 per cent) consider cashflow the issue most likely to influence their operations, ahead of wages, interest rates, fuel prices, access to credit, and the level of the dollar."For the RBA, the run of softer news on the economy means that any chance for interest rate increases is very limited and unless there is a clear improvement in the economy in the next quarter or two, there is some risk interest rates could be cut," said Stephen Koukoulas, economics advisor for Dun & Bradstreet.