US parents will increase their spending on back-to-school shopping this year, according to a survey by the National Retail Federation.

The average family with school-aged children will spend US$527.08 compared to $443.77 last year, NRF said, with total spending expected to hit the $17.6bn mark compared to $13.4bn last year.

Apparel and electronics will provide key momentum to sales growth, the survey said, with average spending of $228.14 compared to $205.31 a year ago.

Parents needing to buy a uniform will spend $223.73 more on clothes and accessories and $119.91 more on shoes than those who don't.

The former will frequent department stores more than the latter.