Nearly 14,000 staff at Halifax and Bank of Scotland entered 2008 with a stake in a £12 million payout as their sharesave scheme matured.
Workers who joined the scheme in 2002 gained an average of £800 after paying in £50 a month over the last five years.
Around 4,400 workers took up the offer to buy shares at an option price of £5.975 per share, and based on the current HBOS share price (£7.40), they stand to make an average gain of almost £800.
Colleagues who saved the maximum monthly amount of £250 stand to make around £3,900.
More than 9,300 other HBOS staff joined the three-year Share-save plan in 2004, with an average monthly contribution of £70.
The option price for this plan is £5.443, and the average gain based on the current HBOS share price (£7.40) will be over £980.
Staff who saved the maximum monthly amount of £250 stand to make up to £3,400.
Sharesave is a special Government-approved type of tax-free savings account run by banks and building societies.
Sharesave schemes are set up by companies who want to give their employees the opportunity to have their own share stake in the firm.
Workers can save between £5 and £250 per month for three, five or seven years and will receive a tax-free bonus based on their monthly savings.
They can take this amount as either cash or they can use the funds to buy HBOS shares at a discounted price agreed at the start of the plan.
Each will have up to six months to decide what to do with their savings. ..SUPL: