What Should I Do if My Coffee Tastes Metallic?

If you are a regular coffee drinker who brews your own coffee, you most likely have achieved a certain level of consistency where the taste of coffee doesn’t show too big of a change between different brews.

That being said, we all experience times where our freshly brewed coffee tastes horrible for absolutely no reason despite following the same procedure as we always do, prompting us to think if we have done something wrong.

A complaint that we hear sometimes is coffee tasting metallic out of nowhere, which is definitely not a pleasant surprise considering that it’s such an odd taste for your coffee to have. While coffee tasting too sour or too bitter are things that we are used to experiencing, a metallic taste can cause a bit of shock.

While there are a fair few reasons that can cause this to happen, these issues can be fixed fairly easily, which is why you shouldn’t be concerned.

Without further ado, let’s dive into the reasons that may cause your coffee to taste metallic and how to solve them. We have listed the reasons in order starting from the most likely cause, so you can use this guide as a checklist to go through the solutions until the metallic taste is completely gone.

Clean Your Coffee Maker

If you’re using an automatic coffee maker, it is likely to be the primary culprit that causes your coffee to taste metallic. 

As we don’t really pay attention to how dirty our coffee makers get due to not being able to see their interiors, it’s a problem that eventually comes up after an extended period of usage without cleaning. That being said, it’s completely natural for dirt to build up in your coffee maker, and it can be cleaned quite easily.

Run your coffee maker with a mixture of vinegar and water that has a vinegar to water ratio of 2 to 1, and then wash the vinegar out by running a couple of water cycles. If you have access to a descaling solution, you can use it instead of the vinegar and water mixture.

After the process, try brewing another cup of coffee and see if there is an improvement. If there is, you most likely solved the problem, meaning that you don’t have to carry on with the rest of the steps.

If the situation hasn’t improved, you can move on to the next step.

Change the Water You’re Brewing With

If you’re using tap water to brew coffee, there is a good chance that water is the cause of your problem. Tap water tasting metallic isn’t something unheard of in certain areas, and as coffee consists mostly of water, there would be no surprise that it makes your coffee taste metallic.

To test this out, we recommend buying a fresh bottle of water and brewing your coffee with it. If your problem is solved but regularly using bottled water isn’t a feasible option for you, you can try filtering your tap water and see if it makes a difference.

That being said, bottled water is often considered a better choice for brewing coffee regardless of the metallic taste as tap water is usually hard, which is bad both for your coffee maker and the taste of your coffee.

More often than not, problems about coffee tasting metallic are solved in this step, but if you’re still having the issue, let’s carry on.

Ensure That Your Coffee Is Roasted Properly

Green coffee is known to have a metallic taste at times. While any coffee bean that is roasted properly should never have a metallic taste, it could be a good idea to try brewing with a different batch of coffee beans if nothing else worked so far, especially if you are losing light roast coffee beans.

If you’re roasting your own coffee beans, this is more likely to be the culprit, as something may have gone wrong during the roasting process without you noticing. For this reason, trying with a batch of coffee beans that are preferably medium roast or darker is a good way of ensuring that coffee beans aren’t the culprit if the problem keeps happening.

Change Your Coffee Cup

If you’re using a metal thermos or a metal coffee cup for your coffee, it may be causing your coffee to taste metallic. While a high-quality coffee thermos should never cause such a problem, it doesn’t hurt to use a regular coffee mug and see if the problem keeps occurring.

Change Your Coffee Filter

The last thing to try is to change your coffee filter if you’re using a metal filter, as the metallic taste may be coming from the filter after all. Try to brew your coffee with a paper filter instead, which will hopefully solve your problem.

While the problem being filter-related is quite unlikely, which is why it’s the last step, there is else left to try after this point. 

Hopefully, you have solved the problem way before this step and won’t even be reading this part!


With that, we are done with all of the steps. 

While it’s definitely quite unpleasant to be greeted with a metallic taste just as you were about to sit down and enjoy a nice cup of coffee, it’s not a cause for concern as the problem can be solved easily.

We hope that the steps we have listed helped you to get the metallic taste out of your coffee as quickly as possible.

Have a great day, and enjoy your coffee!