There are many exceptions to this rule—maybe it's better to think of it as a guideline—but it can be helpful with words like the ones below.
New Words That Break The I Before E Rule
Images. Unfortunately, it was created after most of the 'ie' words were. I before e is one of those rules.
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I before e, except after c, which has. I before e except after c, or when sounded as a as in neighbor or if you continue with qualifications you can get closer to a useful rule—don't apply it to names or foreign borrowings; I before e, except after c or when sounded as 'a' as in 'neighbor' and 'weigh' unless the 'c' is part of a 'sh' sound as in 'glacier' or it appears in comparatives and superlatives like 'fancier' and also except.
Only 44 words actually follow that rule.
Only 44 words actually follow that rule. But there are plenty of exceptions. I before e, except after c. Using this approach, 47% of ie words break the rule.