What are Mortal Sins In the Catholic Church & Where Can I Find a Mortal Sins List?

mortal sins list

It’s not easy to find a comprehensive mortal sins list. They’re usually scattered about in various sources. Although we make no claim that this list is complete, it is quite comprehensive.

We do know that some of the most frequently confessed sins are sins against purity. Most practicing Catholics know when they’ve committed such sins and also know to go to confession. However, it can be hard to discern if some sins are grave enough to be considered mortal sins.

Is There a List of Mortal Sins Anywhere?

Whether a sin is mortal or not depends on a variety of factors, which we will address below. However, we found I found this pretty good list of grave sins, which can be mortal sins, depending on the circumstances.

If you have a better list (s) of grave/mortal sins, please share.


What is a Sin?

Sin is an offence against God.

According to Catholic teaching, sin is said to be either venial or mortal.

“One commits venial sin when, in a less serious matter, he does not observe the standard prescribed by the moral law, or when he disobeys the moral law in a grave matter, but without full knowledge or without complete consent.”

Catechism of the Catholic Church

*For a sin to be mortal, three conditions must together be met:

“Mortal sin is sin whose object is grave matter and which is also committed with full knowledge and deliberate consent.

Catechism of the Catholic Church, #1857

In simple terms, you have to know that what you’re doing is wrong. Otherwise it might be grave, but not necessarily mortal.

Well now that we’ve provided you with a Catholic Mortals Sins list below, you can no longer please lack of knowledge.

Yikes.


Grave/Mortal Sins List

If you can think of any other sins that are not included below, we welcome your input. Our goal is to create a list in one place.

  • Involvement in cult practices like masonry, Wicca, wizardry
  • Leaving the Catholic faith for another religion or practice
  • Receiving Holy Communion in a state of mortal sin without confession
  • Receiving confirmation or marriage in a state of mortal sin
  • Firm hatred of God and his teaching
  • Buying or selling of blessed or consecrated objects
  • Using God’s name as a purposeful curse
  • Seriously wishing death or harm upon another person
  • Serious slander about another person
  • Swearing false oaths
  • Perjury or lying under oath
  • Willful failure to fast and abstain on Ash Wednesday/Good Friday
  • Missing mass intentionally on Sunday or Holy Days
  • Willfully working at a task for more than a few hours on Sunday regularly
  • Serious failure to care for your aging parents
  • Wishing evil or death upon your parents or grandparents
  • Failure to baptize your children and raise them in the faith
  • Murder, manslaughter, or homicide
  • Having an abortion
  • Using artificial birth control which causes spontaneous abortion
  • Endangering another while driving drunk
  • Abusing and selling illegal drugs
  • Having oneself sterilized
  • Adultery
  • Fornication
  • Self-abuse
  • Prostituting one’s body for money
  • In-vitro fertilization
  • Human cloning
  • Co-habitation before marriage
  • Stealing a large amount of money
  • Detraction or serious gossip
  • Internet pornography
  • Willfully lusting after another person

Source


The Four Sins That Cry Out to Heaven

This is a traditional list of sins that cry out to heaven. Needless to say, they are very grave and most likely mortal.

  1. Wilful murder, which is a voluntary and unjust taking away another’s life.
  2. The sin of Sodom, or carnal sin against nature, which is a voluntary shedding of the seed of nature, out of the due use of marriage, or lust with a different sex.
  3. Oppressing of the poor, which is a cruel, tyrannical, and unjust dealing with inferiors.
  4. To defraud working men of their wages, which is to lessen, or detain it from them.

The Traditional Seven Deadly Sins

Below are the traditional list of seven deadly sins.

  • Gluttony
  • Sloth
  • Lust
  • Pride
  • Wrath
  • Envy
  • Greed

And Finally, the ORIGINAL List of Mortal Sins – The Ten Commandments

  1. I AM THE LORD THY GOD: THOU SHALT NOT HAVE STRANGE GODS BEFORE ME.
  2. THOU SHALL NOT TAKE THE NAME OF THE LORD THY GOD IN VAIN.
  3.  KEEP THE SABBATH HOLY.
  4. HONOUR THY FATHER AND THY MOTHER.
  5. THOU SHALT NOT KILL.
  6. THOU SHALT NOT COMMIT ADULTERY.
  7. THOU SHALT NOT STEAL.
  8. THOU SHALT NOT BEAR FALSE WITNESS AGAINST THY NEIGHOUR.
  9. THOU SHALT NOT COVET THY NEIGHOUR’S WIFE.
  10. THOU SHALT NOT COVET THY NEIGHOUR’S GOODS.

What should you do if you think you might have committed a mortal sin?


Books to Inspire Us to Live Holy Lives


See Also

You might also like this Prayer for Daily Neglects!


Here is a wonderful sermon on the effects of sin.


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13 thoughts on “What are Mortal Sins In the Catholic Church & Where Can I Find a Mortal Sins List?

  1. Pingback: The scandal of the idea of mortal sin III: Amoris laetitia | Throne and Altar

  2. Leonard Mardeusz

    The list of mortal sins evidently are many. The one area I believe is not preached today by priests. The fact that the Holy Eucharist must not be received if the the person is not in the state of grace.
    The lines to receive Communion are long. The lines for reconciliation are short. I am 83 years old.
    It seems that Archdioceses are more concerned in how any parishioners receive the Holy Eucharist
    than go to confession. That has become the forgotten Sacrament.

    Reply
    1. Vickie

      It does seem that way. I have an opinion that under the list of mortal sins, which could all be summed up as 4 ( idolatry, murder, lust, & stealing) when fornication is listed in red lettering it usually means a definition. This one goes straight to an add of Coventry ? If I understood it correctly. Now don’t you think that this is a form of theft?

      Reply
    2. Vickie

      It does seem that way. I have an opinion that under the list of mortal sins, which could all be summed up as 4 ( idolatry, murder, lust, & stealing) when fornication is listed in red lettering it usually means a definition. This one goes straight to an add of Coventry ? If I understood it correctly. Now don’t you think that this is a form of theft?

      Update: the add was for Coventry eyes & my computer said the site was not safe!

      Reply
      1. BeautySoAncient Post author

        Well your computer is wrong. 🙂

        It’s obviously an ad. Ads are not bad. Ads are how lots of people find out about things. If you are struggling with pornography, you might find an ad like this interesting. Covenant eyes does some great work with offering filtering software for those who struggle with online pornography.

        Websites contain ads, because it is one way users can help to support sites that they like. Sites have expenses. No one is forced to buy anything through an ad and no one is forced to click on an ad.

        Have a blessed day!

        Reply
  3. Jeffrey L.

    I was brought up Catholic (and even had clergy in the family.) A number of years ago (when I was much younger) I was married in the Catholic Church and after a couple of years we decided to divorce. Later I met another woman who was a devout Catholic and we began to talk about marriage but because I was divorced this woman had obvious concerns that we could not be married in the Catholic church. I told her I would look into the possibility of annulling the first marriage; which I did, but I read that there were strict requirements for the church to grant an annulment. I went through the initial interview process and was told that it would be possible to go further in the process. First, there was a $225.00 processing fee for all of the forms that I had to complete (which included a great deal of information regarding my finances.) Next, I was required to attend four counseling sessions with a priest/psychotherapist which each cost $200.00. Then another round of interviews with the representative of the archdiocese and more paperwork which cost $150.00. I was then told that my case would be presented to the tribunal which would decide if the annulment would be granted. Eventually I was notified that the annulment was granted, and I was to remit another $150.00 for the certificate processing. I was also told that a donation to the church would be required and the amount was determined based on my financial information. My required donation was $1800.00. The annulment was subsequently granted – for a grand total of $3125.00. Is extortion a mortal or venial sin?

    Reply
    1. BeautySoAncient Post author

      Wow. Leaves a bad taste in the mouth. But I suppose they have expenses (canon lawyers, administrative staff, etc, to investigate and process an annulment).

      Reply

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