Open a Citibank checking account by March 31, 2010 and receive a $100 bonus. You must be a new Citibank checking account customer and make a minimum deposit of $1,000.

Within the first month of opening a regular checking account you must begin making at least one direct deposit, two electronic bill payments, or five non-PIN debit card transactions each month for three consecutive months.

Eligible purchases must be made through the MasterCard Network and include those you sign for or small dollar purchases that do not require a signature. Purchases made made through other payment processing networks do not qualify.

Other details of the bank deal include:

• Free ATM access at over 26,000 Citibank ATMs in the U.S., including machines at 7-Eleven stores
• Free online bill pay
• Free mobile banking
• Free identity theft solutions

Existing Citi credit card customers received this offer, which requires a code of C2CA to open an account and qualify for the deal. You can apply online or by phone, but check to make sure you qualify for the $100 bonus. The bonus is deposited into your account within 120 days from the end of the statement period that you meet all the requirements.

This offer is only available to people 18 and older, and is limited to one per customer.

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If you don’t want to tie up your savings for too long but want to earn some money, Country Bank for Savings has a six-month Relationship certificate of deposit (CD) with a 1.85% annual percentage yield (APY). Relationship CDs are also available for terms of 15 months (2.25% APY) and 24 months (2.5%  APY).

Relationship CDs are only available to customers who live in Massachusetts and have a checking account at the bank. Other details of the offer include:

• Minimum deposit of $500 to open CD
• Minimum balance of $1,000 in a Country Bank checking account
• Must set up monthly direct deposit into checking account
• Penalty for early withdrawal
• Interest is paid monthly and can be withdrawn at any time

Other CD rates and terms are available to people who don’t live in Massachusetts and accounts must be opened by mail. Call the bank for more information on opening an account if you don’t live in Massachusetts. Other CD rates as of Feb. 19, 2010, include:

• 6 months (1.6% APY)
• 12 months (1.75% APY)
• 15 months (2% APY)
• 2 years (2.25% APY)
• 3 years (2.25% APY)
• 4 years (2.5% APY)
• 5 years (2.5% APY)

The bank, which is based in Ware, MA also offers CD rates for terms as short as two months. CD rates are available for fixed-rate and variable CDs.

Costco is offering an online savings account for its members with the help of Capital One Bank. The savings account has a cash bonus of up to $60.

The InterestPlus Savings has a 1.5% annual percentage yield (APY), which is effective as of Feb. 16, 2009. The Costco savings account also has a 10% quarterly bonus on interest earned on average balances of $15,000 and up. Details of the online savings account offer include:

• 1.5% APY applies to balances of $5,000 and up
• Savings rates are variable and can change at any time
• Minimum deposit of $5,000
• Electronic statements
• Must have six withdrawals by online transfer per month

Costco customers can earn a cash bonus that is based upon their membership. To earn the $60 bonus you must be a Costco Executive Member when you open the savings account. Costco Gold Star or Business members are eligible for a $20 bonus.

The cash bonus is only paid out to customers who open a Capital One Direct Banking account for the first time through any Costco program. The savings account must be funded with at least $5,000 within 30 days of opening to receive the bonus.  The bonus is paid within four to six weeks as two partial credits.

Costco operates a chain of 566 membership warehouses around the world that offer a variety of name-brand merchandise.

Residents of certain states can take advantage of a checking account deal at Sovereign Bank that offers a cash bonus. The bank deal requires you to open a Premier Checking Account and Premier Money Market account to qualify for a $150 cash bonus.

Details of the checking account offer include:

• $100 minimum deposit
• Must enroll in free online banking when opening account
• Set up and receive one direct deposit within 60 days of opening account
• Use a Sovereign Debit Card for five purchases within 60 days of opening checking account
• $150 bonus deposited to your account within 75 days once requirements are met

Sovereign Bank doesn’t charge a fee to use ATMs at other banks. However, a fee may be imposed by non-Sovereign Bank ATMs.

The money market account offers a 1.5% annual percentage yield (APY) for three months for balances between $10,000 and $499,999. The money market also has no monthly fee or minimum balance requirement as long as you have a Premier Checking Account.

You must be a resident of Maine, Vermont, New Hampshire, Connecticut, Rhode Island, Massachusetts, New York, New Jersey, Pennsylvania, West Virginia, Maryland, Delaware, or the District of Columbia. New money market and checking accounts must be opened by March 13 to qualify for the $150 bonus and 1.5% APY.

Golf Savings Bank has one of the best certificate of deposit (CD) rates this week if you can afford to park your money for a couple of years. The bank is offering a CD rate of 2.2% annual percentage yield for two years. Details of the CD offer include:

• CD rates apply to balances up to $90,000
• Interest is compounded daily and paid monthly
• Fees could reduce total interest earned

The bank charges a penalty for early withdrawals. The amount of the penalty is based upon the term of the CD. For example, if you withdraw money early from a two-year CD , you pay six month’s interest on the amount withdrawn.

The bank offers CDs with other terms, including a 15-month bump certificate that allows for one rate change during the term. If you choose to change the interest rate, the term remains the same. There are no fees for exchanging your interest rate for a new one.

Other CD rates for deposits up to $90,000 (current as of Feb. 1, 2010) include:

• 1.14% annual percentage yield (APY) for 3 months
• 1.35%  for 6 months
• 1.8%  for 12 months
• 1.9%  for 15 months
• 2.5% for 3 years
• 2.65% for 4 years
• 3% for 5 years

Golf Savings Bank is based in Mountlake Terrace, WA, and has bank branches throughout Washington, Montana, and Idaho.