A new survey from TD Bank  found that despite the challenges facing them, more than half (60 percent) of small business owners feel their business is performing at expected levels so far in 2013.

TD Bank's survey, which polled more than 600 small business owners, also asked owners to identify their barriers to success. They reported that their top three challenges are growing their business (51 percent), the economic environment (45 percent) and cash flow (34 percent).

Half of the small business owners (50 percent) said that growth or expanding their business was their biggest opportunity this year. Specifically, they want to grow their business, expand services, develop new contacts and new clients, and drive better sales.

The survey found that the optimism in performance does not extend to hiring. The number of small business owners reporting that they plan to hire in 2013 went down by half, compared with data TD gathered through a small business owner outlook survey of more than 500 business owners in December 2012. Only 17 percent plan to hire at least one new employee, down from 32 percent six months ago. However, more than three-quarter of small business owners (79 percent) intend to keep staffing levels the same, up from 59 percent in December.

TD also asked those small business owners who don't intend to hire in 2013 whether they would hire if circumstances made it possible, and 68 percent said they would not. They cited cost control (50 percent), worry that there wasn't enough work (49 percent) and lower sales and revenue (36 percent) as reasons for not hiring.