Answer: Generally, you’ll want to make sure you’re on track for retirement before paying down a mortgage. Your priority usually should be contributing at least enough to your 401(k)s to get the full company match, and then contributing the maximum to Roth IRAs. This puts money in retirement “buckets” that get different tax treatment — withdrawals from 401(k)s are typically taxable as income, while Roth IRA withdrawals typically are tax free — and that allows you to have more control over your tax bill in retirement.

If you have additional money to contribute to your goals, you’ll have to decide whether to pay down your mortgage, put more into your 401(k) or contribute to a taxable account earmarked for retirement. (This latter option would give you yet another tax bucket — one where you can qualify for capital gains tax rates.)

It’s good to be mortgage-free when you stop work, but if your retirement savings aren’t adequate, you should be bolstering them now. Ten years from retirement is a good time to consult with a fee-only financial planner to discuss your individual situation, reality-test your retirement plans and fine-tune your investments.

We have 20-year term life insurance policies to cover the mortgage in case the worst happens to either of us. Both my husband and I contribute to our 403(b) retirement accounts at work.

However, we don’t have any emergency cash fund in our banks. We figured we can always borrow from our 403(b) accounts. We both have good credit scores (above 750). We have no debt besides our mortgage.

Any financial advisors out there would tell us to invest that $513 a month into mutual funds or stock because of all the good reasons that I’m sure you know better than us.

However, this is how my calculation works: We’d be saving about $100,000 interest if we pay the mortgage loan off in 16 years. On top of that, we won’t have to make any payment for the remaining 14 years, which would be almost $200,000. The total saving is about $300,000.

Is there any mutual fund out there that can yield that much money if we decided to invest in it? Is it a good idea to do what we are doing right now based on our financial situation?

Answer: Actually, $513 a month invested in a mutual fund would result in about $765,000 after 30 years, assuming an average annual return of 8% (which is the minimum investors have received in every 30-year investing period since 1928, according to Ibbotson Associates).

Even if you look just at the 16-year repayment period, investing the money would recoup about twice what you expect to save in interest.

Now, you could probably build a substantial nest egg if, as soon as you paid off the mortgage in Year 16, you started investing your mortgage payment plus the extra $513. But you’d never make up the ground lost by not investing the monthly $513 from the start.

Also, you need to consider more than potential investment returns when deciding to prepay a mortgage. You have to look at your entire financial picture and make sure all your bases are covered before you pay off a low-rate, potentially tax-deductible debt.

Your lack of an emergency fund is worrisome. Yes, you can tap your retirement funds, but those loans could become taxable, permanent withdrawals if you lose your jobs and can’t pay the money back.

It’s far better to have cash in the bank to cover the unexpected expenses and financial setbacks that life can present.

You should have, at a minimum, an emergency fund equal to three months’ worth of basic expenses before you consider prepaying your mortgage. A fund equal to six months’ worth of expenses is even better.

Since you’re a homeowner, you also should set aside a separate, sizable amount to cover major home repairs — $2,000 at least, although $5,000 is better.