The National Federation of Independent Business said Tuesday its Small Business Optimism Index dropped 0.1 point to 94 last month.
While details of the survey were fairly mixed, key indicators such as planned hiring, capital spending, inventory accumulation and sales all advanced in August, suggesting an improvement in sentiment in the months ahead.
"Capital spending and inventory investment plans increased as well, all activities that would put some energy into [gross domestic product] growth," the NFIB said in a statement.
That would fit in with expectations of an acceleration in activity in the second half of the year, though growth slowed somewhat early in the third quarter. The economy grew at a 1.8 percent annual rate in the first half of the year.
There was a big increase in job creation plans, which jumped to levels last seen in January 2007, a positive sign for the labor market amid signs of a slowing in job growth trend. However, the share of firms reporting they could not find suitable candidates to fill open positions fell.
While owners were optimistic about sales, they were downbeat on earnings. Expectations for business conditions over the next six months fell again in August. There was also a decline in the share of owners saying this was a good time to expand.