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.
***For any specific questions about your situation, please speak to a traditional priest. ***
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.
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
- 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
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.
- Wilful murder, which is a voluntary and unjust taking away another’s life.
- 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.
- Oppressing of the poor, which is a cruel, tyrannical, and unjust dealing with inferiors.
- 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.
And Finally, the ORIGINAL List of Mortal Sins – The Ten Commandments
- I AM THE LORD THY GOD: THOU SHALT NOT HAVE STRANGE GODS BEFORE ME.
- THOU SHALL NOT TAKE THE NAME OF THE LORD THY GOD IN VAIN.
- KEEP THE SABBATH HOLY.
- HONOUR THY FATHER AND THY MOTHER.
- THOU SHALT NOT KILL.
- THOU SHALT NOT COMMIT ADULTERY.
- THOU SHALT NOT STEAL.
- THOU SHALT NOT BEAR FALSE WITNESS AGAINST THY NEIGHOUR.
- THOU SHALT NOT COVET THY NEIGHOUR’S WIFE.
- THOU SHALT NOT COVET THY NEIGHOUR’S GOODS.
What should you do if you think you might have committed a mortal sin?
- Pray an act of contrition.
- Get thee to a confessional as soon as possible!
- If it is impossible to get to a confessional, pray an act of perfect contrition until you can get to a confessor.