Prayer for forgiveness: how to ask God to forgive your sins

What is a prayer for forgiveness?

A prayer for forgiveness is an honest turning of the heart back to God, asking him to pardon your sins. It is the first movement of all true prayer: “the first movement of the prayer of petition is asking forgiveness, like the tax collector in the parable” (CCC 2631). You do not need special words. You need a humble and contrite heart — the one offering God never refuses (Psalm 51).

The shortest prayer for forgiveness in the Gospel is seven words long. When the tax collector dared not even look up, he struck his breast and said, “O God, be merciful to me a sinner” (Luke 18:13), and Jesus said he went home justified. That is the pattern: not a performance of sorrow, but a sinner trusting in a merciful God. The prayers below are ways the Church has prayed it for centuries.

The Jesus Prayer and the publican’s prayer

The oldest Christian prayer for mercy grew from the cry of the blind men and the tax collector in the Gospel. The Church calls it the Jesus Prayer, and the Catechism holds it up as a way to pray always, by which “the heart is opened to human wretchedness and the Saviour’s mercy” (CCC 2667). Repeat it slowly, in rhythm with your breath, until the words sink from your lips into your heart.

Psalm 51 (50): the great prayer of repentance

When you want more than a single line, pray Psalm 51 (50), the Miserere. It is the Church’s great prayer of repentance, prayed by King David after his sin and by Christians in every age who ask God for a new heart. Make its words your own; they say everything a sinner needs to say.

The Act of Contrition

The Act of Contrition is the Church’s set prayer of sorrow, prayed in Confession and whenever you ask God’s pardon. It begins, “O my God, I am heartily sorry for having offended thee.” In it you tell God you are sorry, say why — because sin offends his goodness, not only because you fear its consequences — and resolve to sin no more. Our full guide gives the traditional Act of Contrition and explains perfect and imperfect sorrow.

A prayer to forgive others, and to forgive yourself

There is a condition Jesus set on the mercy we ask: “forgive us our trespasses, as we forgive those who trespass against us.” The Catechism puts it starkly: this outpouring of mercy cannot penetrate our hearts as long as we have not forgiven those who have wronged us (CCC 2840). Forgiving does not mean pretending the wrong did not happen; it means releasing the debt to God and refusing to let bitterness rule you.

“Forgiving yourself” is not a formula in Catholic teaching, but the need behind the phrase is real. Once God has forgiven a sin, to keep condemning yourself can become a quiet refusal to believe in his mercy. Accept his pardon as a gift. If guilt lingers long after Confession, or you cannot believe you are forgiven, read our guides to scrupulosity and Catholic guilt, and speak to a priest.

How to pray for forgiveness

1. 1

   Come as you are

   You do not need to feel worthy; the tax collector did not. Turn to God honestly, trusting that he wants to forgive more than you want to be forgiven.

2. 2

   Name what you have done

   Tell God plainly the sins you are sorry for. Naming them is not informing him; it is you agreeing with the truth and refusing to hide.

3. 3

   Ask, and mean it

   Pray the publican’s prayer, the Jesus Prayer, Psalm 51 or an Act of Contrition, and resolve, with his help, to turn from sin and what leads to it.

4. 4

   Trust, and take the next step

   Thank God for the mercy you asked for. If a sin is grave, plan to bring it to Confession; our guide to how to repent shows the whole path of return.

Does God forgive all sins?

Yes. There is no sin so great that God’s mercy cannot reach it for anyone who repents. “Where sin increased, grace abounded all the more” (CCC 1848, quoting Saint Paul). The whole Gospel is the revelation of God’s mercy to sinners (CCC 1846). To receive that mercy, we have only to admit our faults and ask: “If we confess our sins, he is faithful and just, and will forgive our sins” (CCC 1847).

What about the “unforgivable sin”? The Catechism explains that there are no limits to God’s mercy; the sin against the Holy Spirit is the deliberate, final refusal to accept it (CCC 1864). As long as you can still pray for forgiveness, you have not committed it — your prayer is itself the opposite of that refusal. Despair, which gives up on God’s mercy, is a temptation to resist, not the truth about your soul (CCC 2091). Our guide to the unforgivable sin goes deeper.

Prayer for forgiveness and the Sacrament of Confession

Praying for forgiveness and going to Confession are not rivals; they belong together. God forgives sins, and from the beginning Christ gave his Church the ministry of reconciliation, entrusting the power to absolve to his apostles and their successors (CCC 1441–1442). In Confession, Christ himself forgives through the priest, and you hear the words of absolution and receive his peace (CCC 1422).

For everyday faults (venial sins), a heartfelt prayer for forgiveness, a good act of contrition and the Eucharist obtain God’s pardon. But for grave (mortal) sin, the Church teaches that we are bound to confess it in the sacrament: anyone aware of a mortal sin must be reconciled through sacramental absolution before receiving Holy Communion (CCC 1456–1457). So pray for forgiveness now, with all your heart — and if a sin is serious, let that prayer carry you to Confession, with help from our guide to praying before Confession.

Sources

Cited by paragraph and verse, so you can read them in full. In the end, your priest has the final word.

• –Catechism of the Catholic Church, 1422
• –Catechism of the Catholic Church, 1440–1442
• –Catechism of the Catholic Church, 1846–1848
• –Catechism of the Catholic Church, 1864
• –Catechism of the Catholic Church, 2631
• –Catechism of the Catholic Church, 2839–2840
• –Psalm 51 (50)
• –Luke 18:9–14
• –Code of Canon Law, canons 959–964 (the Sacrament of Penance)

Confession Compass is an independent educational tool, not an official body of the Catholic Church. It never absolves sins: only a priest, in the Sacrament of Reconciliation, can absolve.