ADP Payroll is one of the best payroll companies for small businesses. It offers full-service payroll services, which means its online payroll software calculates paycheck amounts and deposits them automatically into your employees’ bank accounts. It also automatically calculates payroll tax amounts and files them with state and federal governments on your behalf. Some of ADP’s plans include basic HR support, which can be useful for small businesses that don’t have an in-house human resources department. However, ADP might not be the best payroll company for your business specifically. The best payroll management solution for you depends on your payroll budget, number of employees, and preferred payroll features. Thoroughly research any payroll company before signing up, and make sure to take advantage of free trials so you can figure out which software will be best for you. (ADP offers a three-month free trial, and Square Payroll won’t charge you until you run payroll for the first time. You can set up an account and get used to the interface for free.)