Maximize your retirement savings with practical tips on 401(k) plans, Roth IRAs, and automated contributions, and watch your nest egg grow over time.

CNBC Select defines compound interest, how it works and ways to take advantage of it if you're looking for a new credit card or somewhere to stash your cash.

Credit cards charge interest, known as APR, if you carry a balance past your due date. Here's a step-by-step guide on how to calculate your credit card interest.

Learn how net interest margin (NIM) indicates a financial firm's profitability. Explore its definition, formula, and factors influencing it effectively.

NerdWallet's list of the best savings accounts feature options with great customer service, higher-than-average interest rates and low or no fees.

The best high-yield savings accounts have high APYs, low fees and are federally insured.

How to take full advantage of your 401(k) plan and boost long-term savings, tax benefits, estate planning and flexibility.