Which Comes First: Saving Money for Your Retirement? Or Your Kid's College?

They're both priorities, but if you had to pick the most important ...?

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While you should certainly help your children save for college, you can't ignore your retirement plan in the process.

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When money is tight, you have to make choices. Which is why if you're putting money away into your child’s college account while trying to also save up for a retirement, you may well wonder – what should be the priority?

Certainly there are some reasonable arguments for making your savings priority be college – and then retirement. After all, if you're a parent, you probably feel that your kids' needs should come first. Assuming you had your kids before your mid-40s, college may be coming a lot faster than your retirement. You might also feel that if you've been cash poor and buried in bills your entire life that you can take whatever is coming in your not-so-golden years, but you're absolutely not going to let your financial situation spoil your kids' chances at financial happiness.

All understandable arguments, but spoiler alert: Financial experts generally will always tell you that retirement should be your first savings priority. Saving for your kids’ college tuition comes second. That's assuming you aren't rich and can't easily fund both goals, of course.

Still, if you're somebody who is financially struggling and feel you should pay for your kid's college education before your own retirement, you might ask: Why is retirement the main priority? If you've ever wondered why the experts recommend retirement savings over college, here's a rundown of the retirement-first arguments.

You can borrow for college; you can't borrow for retirement. Not that seniors haven't tried to. Last year, the Employee Benefit Research Institute analyzed numbers from the Federal Reserve and found that the average debt senior citizens carried in 2010 was $50,000, up 83 percent from what seniors were carrying in 2001. But obviously, planning your retirement on the premise that you'll let your credit cards fund your golden years is a dangerous strategy.

Meanwhile, while you can't borrow for retirement, your kid "has the ability to apply for scholarships, grants, federal work study programs and student loans, either unsubsidized or subsidized, to aid in the cost of education," says Darren Jurick, associate vice president at Ameriprise Financial, a financial planning firm, in Plantation, Florida.

Your kid can also go to college on the cheap – and still get a quality education – by attending community college for two years and then transfer to a bigger university. You can retire on the cheap, too, but you don't want to do it too cheaply. If you're dumpster diving for food, that's not exactly a quality retirement.

[Read: 5 Ways to Save for Your Child's College Education.]

Spending your resources on retirement may make more financial sense, from a numbers standpoint. Wayne Connors is a managing partner at 401k Investor, LLC, a company headquartered in Glastonbury, Connecticut that runs a website that helps do-it-yourself investors build their retirement portfolios – and so you'd expect him to be on the side of funding retirement over college. And he is. But as he puts it, the interest rates for student loans, at least the ones your kids will take out, are still less than what you can make by putting money in investments for retirements.

"You can take out student loans for 3.8 percent, or you can put your money in a diversified investment portfolio across stocks and bonds, and you're going to average closer to 8 percent. If you look at the numbers with the same dollar amount, investing in retirement, you're going to be way ahead," Connors says.

Still, everyone's financial situation is different, and whatever you do, proceed carefully. Borrowing for student loans is expensive – and is becoming more expensive. The 3.8 interest rate that students are paying for federal loans is climbing to 4.6 percent this July. And if you're a mom or dad, and you're borrowing money through a Direct PLUS Loan, available to parents of an undergraduate, the interest rate will be 7.21 percent July 1. If you borrow a lot of money for your kids' college at 7.21 percent or some other future high rate, you're going to have to pay it back – and that money you're paying back could have been used toward your retirement.