From insurance premiums to doctors' visits, the cost of health care keeps climbing -- and you're likely picking up a larger share of the tab, too.

In 2015, workers will spend an average of $5,151 on insurance premiums and out-of-pocket costs like deductibles and co-pays — that's up nearly 8% from last year, according to a report from human resources firm Aon Hewitt.

Not only are health care costs rising, but many employers are requiring employees to pay for a bigger chunk of their health care with increased premiums and higher-deductible plans.

Those without employer-sponsored plans will also face rising costs, as Obamacare premiums are also on the rise. Consulting group PwC, for example, analyzed 2015 offerings and found premiums had jumped by 5.2%.