Is retirement on your radar? Maybe you're even planning to permanently leave the world of work in the coming year. If so, congratulations! You've certainly earned the right to focus on yourself rather than your job.

Before calling it quits and initiating your Social Security retirement payments in 2025, however, there's one thing you'll want to do -- weigh the financial cost of claiming benefits now instead of waiting.

There's a cost to not waiting

You can begin receiving Social Security benefits as early as 62 years of age. However, you won't be receiving as much money as you could be. Anyone waiting until their full retirement age (between 66 and 67, depending on birth year) will see bigger monthly checks.

Social Security's full retirement age is either 66 or 67, depending on when you were born.

Image source: Motley Fool.

The difference can be significant. Getting this four- or five-year head start on your benefits will permanently reduce your payments by as much as 25% to 30%, depending on your age.

The penalty shrinks the closer you get to your full retirement age (FRA). For example, if you claim just one year before reaching full retirement age, your monthly benefits are only reduced between 2% and 14% of your payments at FRA.

Given that the average-sized Social Security check currently stands at just over $1,900, though, this potential difference still isn't small change for most people. It can mean a few hundred dollars per month.

That being said, you should also know that waiting until after you've reached your designated FRA makes your eventual payments even bigger. Anyone who waits to claim benefits until they're 70 years old will see monthly payments between 15% and 25% bigger than they'd receive at their official full retirement age. The table below illustrates the stark financial difference between claiming early or delaying benefits.

Birth Year Full Retirement Age

Percentage of Full Benefit by Age at First Claim

    62 63 64 65 66 67 70
1924 65 80 86 23 93 13 100 103 106 115
1925-26 65 80 86 23 93 13 100 103 12 107 117 12
1927-28 65 80 86 23 93 13 100 104 108 120
1929-30 65 80 86 23 93 13 100 104 12 109 122 12
1931-32 65 80 86 23 93 13 100 105 110 125
1933-34 65 80 86 23 93 13 100 105 12 111 127 12
1935-36 65 80 86 23 93 13 100 106 112 130
1937 65 80 86 23 93 13 100 106 12 113 132 12
1938 65, 2 mo. 79 16 85 59 92 29 98 89 105 512 111 1112 131 512
1939 65, 4 mo. 78 13 84 49 91 19 97 79 104 23 111 23 132 23
1940 65, 6 mo. 77 12 83 13 90 96 23 103 12 110 12 131 12
1941 65, 8 mo. 76 23 82 29 88 89 95 59 102 12 110 132 12
1942 65, 10 mo. 75 56 81 19 87 79 94 49 101 14 108 34 131 14
1943-54 66 75 80 86 23 93 13 100 108 132
1955 66, 2 mo. 74 16 79 16 85 59 92 29 98 89 106 23 130 23
1956 66, 4 mo. 73 13 78 13 84 49 91 19 97 79 105 13 129 13
1957 66, 6 mo. 72 12 77 12 83 13 90 96 23 104 128
1958 66, 8 mo. 71 23 76 23 82 29 88 89 95 59 102 23 126 23
1959 66, 10 mo. 70 56 75 56 81 19 87 79 94 49 101 13 125 13
1960 and later 67 70 75 80 86 23 93 13 100 124

Data source: Social Security Administration.

Your marching orders, therefore, are to get in touch with the Social Security Administration -- online, in person, or by phone -- and compare all of your benefit options as they stand right now. You may find there's good reason to continue working for at least another year. Or, you may earn there's not enough upside to sticking with your job until you're 70 years old.

There's no additional benefit in waiting to file once you've turned 70, by the way. In fact, there's a bit of an incentive to do it as soon as possible after you turn 70 years old. The Social Security Administration only pays six months' worth of retroactive benefits. If you wait seven months or more to claim, you're leaving money on the table that you can never get back.

Don't stop there

Comparing your projected Social Security payments isn't the only thing you'll want to consider, of course, if you've not yet claimed but intend to do so soon. Other pre-retirement tasks include making sure you've got a convenient way to receive these direct deposit payments (no paper checks anymore!) and making sure the Social Security Administration's information about your income history is correct. Errors are possible, even though you've paid Social Security taxes on this income as you earned it.

Perhaps the most important chore to cross off your pre-retirement checklist, however, is updating or making a plan for your money once you do retire. Do you need a bunch of cash sitting in a low-interest checking account, or can you commit some of your money to higher-yielding money market funds that are still relatively liquid? Is your portfolio still too growth-oriented? If so, now's the time to start reshaping it; much can happen to the market over the course of just a few months. You may also want to consider buying a supplement to Medicare's coverage if you're currently covered by a workplace health plan.

Whatever your future holds, it's never too soon to start doing some fact-finding and money-minded planning. Just knowing your numbers is half the battle.

Managing your money effectively during retirement is the other half.