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Listerhill Credit Union is a nonprofit financial cooperative improving lives in our community.

If you live in Alabama, Georgia, Mississippi, Florida, or Tennessee, you are eligible to become a member. Depending on your individual eligibility, we may require membership into an approved association at no cost to you.

You can also qualify for membership by being a family member of a current or potential Listerhill member.

With only $5, you can join Listerhill today and start taking advantage of a lifetime membership.

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Rule of 72 Calculator by Years

How It Works

The Rule of 72 is a way to estimate how long it will take for an investment to double at a given interest rate, assuming a fixed annual rate of interest.

You simply take 72 and divide it by the interest rate number. So, if the interest rate is 6%, you would divide 72 by 6 to get 12. This means that the investment will take about 12 years to double with a 6% fixed annual interest rate.

This calculator flips the 72 rule and shows what interest rate you would need to double your investment in a set number of years. Enter the number of years you'd like an investment to double and see what the interest rate would be to make it happen.

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Frequently Asked Questions

  • Do I have to be a Listerhill member to apply?

    You can apply as a current member or become a member during the application process if you meet eligibility and credit requirements.

  • What does 0% APR for 12 months mean?

    It means you won't be charged interest on qualifying purchases for the first 12 months after opening your new Listerhill Visa Signature® Rewards, Keystone Signature® Rewards, Visa Platinum®, or Keystone Platinum® credit card.

  • How long does the 0% APR last?

    This introductory 0% APR offer applies for 12 months from account opening.

  • Do current Listerhill credit cardholders qualify?

    No; current Listerhill Visa Signature® Rewards, Keystone Signature® Rewards, Visa Platinum®, and Keystone Platinum® credit cardholders are not eligible for this offer, but other promotions may be available.

  • Who qualifies for the 0% APR for 12 months offer?

    This offer is available to new Listerhill Visa Signature® Rewards, Keystone Signature® Rewards, Visa Platinum®, and Keystone Platinum® credit cardholders and is subject to credit approval.