CHICAGO (US) - AMERICANS are changing the game plan for retirement, with millions labouring right past the traditional retirement age and working into their late 60s and beyond.

While the average retirement age remains 63, that standard may be going away as baby boomers close in on retirement without sufficient savings.

For 64-year-old Mr John Lee, 'retirement' bears a strong resemblance to his full-time working career - full of 40- and 50-hour weeks as an IT technical support specialist. He's not strapped but likes the extra cash and the feeling of being needed.

But for Ms Melissa Fodor, a retired travel agent who works part-time as a caregiver for the elderly, the extra work 'keeps my head above water' and there's no end in sight to that financial need at age 68.

Although the work is satisfying, she confides that 'financially I'm kind of scared most of the time. Because what should happen if my health and my body fail?'

Growing evidence documents that Americans are working longer as they live longer.

29 per cent of people in their late 60s were working in 2006, up from 18 per cent in 1985, according to the Bureau of Labor Statistics (BLS). Nearly 6 million workers last year were 65 or over.

Over the next decade, the number of 55-and-up workers is expected to rise at more than five times the rate of the overall work force, the BLS reported.

A slowing economy and stock market, squeezing funds set aside for retirement, also are contributing.

In an April survey conducted for American Association of Retired Persons (AARP), 27 per cent of workers age 45 and over, and 32 per cent of those 55-64 said they had pushed back their planned retirement date because of the economic downturn.

The telephone poll by Woelfel Research interviewed 1,002 respondents and carried a sampling error margin of plus or minus 3.1 percentage points.

'We have people who are healthier, who are living longer and have more economic reasons to stay in the work force,' said Mr David Certner, AARP's legislative policy director. 'On the employer side, you have greater demand for experienced (older) workers. That all adds up to longer work lives.'

Mr Lee never envisioned putting in long work weeks in his mid-60s.

The Georgian resident battled frequent work stress before taking early retirement from Coca-Cola at 55. He lay wide awake for many restless nights thinking about the job, and believes all the strain caused health problems in the form of fibromyalgia and chronic back pain.

But when his old employer called offering contract work at his specialty in mainframe systems, he gladly accepted. Tennis and golf hadn't worked out as retirement hobbies, and he decided he could use the money for occasional trips overseas and to help out his children and grandchildren.

'Going back to work wasn't the plan,' he said. 'But after I retired, before they called me, I really didn't have anything to do.So when they called, I jumped on it.'

Mr Lee, who makes more than $50,000 from the contract work, isn't the only one in his house working after retirement. His wife Joyce, 60, also took early retirement but went right back to work as a real estate agent.

They say the extra household income supplements their combined $3,000 a month in company pension payments and adds to $1.3 million in assets to assure their eventual retirement will be financially comfortable.

Working longer is generally the best option for those who come up short on retirement savings. And with many people's investment portfolios and 401(k)s down significantly in recent months, it has become a compelling alternative for many retirees or near-retirees to having to live on less.

'You really don't want to be pulling more money out of a portfolio that's already down,' said Ms Christine Fahlund, a senior financial planner with T. Rowe Price.

In a recent report, the investment management group said continuing to work full time past one's anticipated retirement date could increase annual retirement income by about 7 per cent for each additional year of work.

Working another three years - from 62 to 65, for example - and continuing to save 15 per cent of salary could raise annual income from investments by 22 per cent. Make it 5 years and boost savings contributions still higher - even better.

Putting off retirement also may enable people to delay when they start taking Social Security benefits, which can significantly increase payments.

'The longer the delay, the better' financially, said Ms Fahlund.

'To me the ideal would be 70, because you get the biggest Social Security benefit possible and all those additional years of employment. And it keeps you going mentally and physically too.'

If toiling extra years doesn't sound very palatable, a wannabe retiree may wish to consider spending some of the additional work earnings on hobbies, travel, education or other retirement dreams to make it seem more worthwhile.

'Delaying retirement retirement does not necessarily mean delaying gratification,' Ms Fahlund said.

Such a strategy, she said, could still increase retirement income from investments by 4 per cent per year, or 12 per cent after three years, since the retiree would not have to tap existing savings.

Ms Fodor says that 'to work is to have dignity.' But she has little choice but to keep labouring because otherwise she couldn't pay her bills.

Hailing from Colorado, Ms Fodor ended her career of more than 3 decades as a travel agent when work dried up following the 9/11 attacks, but hasn't stopped working through her 60s. First she sold paint at a home improvement store for seven years. Now she puts in 17 hours a week as a certified nursing assistant and another 10 to 15 hours walking dogs and pet sitting.

Divorced and with no children, she says she will have to work 'forever' to make up for a lack of savings since Social Security doesn't go far enough to make ends meet.

Caring for seniors, a job she loves, pays just US$9 an hour (S$12.76) and dog walking pays less. Squeezed by rising prices and still mounting US$20,000(S$28,372) in debt on her condominium, she stopped buying meat, beer and pricier vegetables and cheeses this year and is making other cutbacks.

'I feel blessed with the good health that I have. But I'm a little bit bitter because I don't think I should be scared financially at 68,' she said, adding that she blames only herself for not saving more. -- AP