How to improve your credit score

The days of easy credit, offered to anyone who can breathe, are history. In this sluggish economy, lenders want to know whether borrowers are likely to stay current on their loans, mortgages, and credit card accounts. Banks and other lending institutions are looking more closely at credit scores, the numbers that (in theory at least) predict the likelihood that a borrower will default on his or her outstanding debts. As a result, knowing your score and ensuring that it's climbing toward the upper percentiles should be a part of your regular financial planning.

The most commonly used credit score is the FICO, developed by Fair Isaac Corporation. FICO scores range from a low of 300 to a high of 850 and may be obtained (for a fee) at myfico.com. The score is considered a predictor: the higher the score, the more creditworthy the consumer. Not so long ago, a score that just nudged the 700 mark would bring lenders to the table with their lowest interest rates. Over the last few years, however, higher scores are often required to get premium rates.

About 35% of the FICO score is derived from your payment history, and another 15% comes from the length of that history. Ten percent of the score is based on the types of credit you use—credit cards, retail accounts, and other types of loans. Another 30% takes into account the amounts you owe as a fraction of your available credit. These numbers and others are fed into the FICO calculator to determine your overall score.

To raise that score, focus on the numbers that matter most:

• Avoid late payments. If you must juggle payments because of cash flow problems, try to limit the number of past-due accounts. A history of late payments on several accounts will hurt your score more than delinquencies on a single account.
• Mix it up. Spread your debt over several types of accounts: installment loans, credit cards, and accounts with retail merchants.
• Curb spending. Keep your outstanding balances to less than 50% of your available credit.
• Check your credit report regularly. By law, you're entitled to a free annual credit report from the three main credit-reporting agencies. Check the report for errors, and follow up to ensure that problems get fixed. One vendor's erroneous reporting can tank your score.

Good credit is a valuable commodity. Guard it carefully.