OCIA Guide: How to Become Catholic (formerly RCIA)

Understanding the Order of Christian Initiation of Adults and the journey into the Catholic Church

Every year at the Easter Vigil, thousands of adults around the world are baptized, confirmed, and receive their first Eucharist — entering into full communion with the Catholic Church. The process that prepares them for this moment is the Order of Christian Initiation of Adults (OCIA), known in U.S. parishes before 2025 as the Rite of Christian Initiation of Adults (RCIA). The process and structure are the same; the renaming reflects a more accurate translation of the Latin original (Ordo Initiationis Christianae Adultorum). Whether you have been thinking about becoming Catholic for years or are just beginning to explore, this guide explains every stage of the journey.

Find a parish with OCIA: Search 19,000+ Catholic churches to find a parish near you. Call the parish office and ask about their OCIA (or RCIA) program.

What Is OCIA (formerly RCIA)?

OCIA is the process by which adults are initiated into the Catholic Church. It is not a class you pass or fail — it is a spiritual journey of conversion, formation, and discernment. The process is rooted in the practice of the early Church, which required a period of preparation before admitting new members. The Second Vatican Council restored this ancient catechumenate, and the rite was promulgated by the Vatican in 1972.

The U.S. bishops approved a new English translation of the rite at their plenary assembly in November 2021, changing the title from "Rite" to "Order" of Christian Initiation of Adults. The Holy See confirmed the translation on February 14, 2024; its use became permitted on December 1, 2024 and obligatory throughout the United States on Ash Wednesday, March 5, 2025. Many Catholics and parishes still informally use the older term "RCIA," but "OCIA" is now the canonical name.

Who Is OCIA For?

Adult initiation accommodates three distinct situations. Strictly speaking, OCIA itself is the rite for the unbaptized; baptized Christians are received through a separate rite. Most parishes form all groups together in a single weekly process for practical reasons, but the liturgical rites and sacraments each group receives are different.

Catechumens: Unbaptized adults who have never been a member of any Christian church. They follow OCIA properly so called and will receive all three Sacraments of Initiation (Baptism, Confirmation, and Eucharist) at the Easter Vigil.
Candidates: Baptized Christians from other denominations (Protestant, Eastern Orthodox, etc.) who wish to enter full communion with the Catholic Church. They are received through a distinct rite — the Reception of Baptized Christians into the Full Communion of the Catholic Church. Since their baptism is valid, they will receive Confirmation and First Eucharist but will not be re-baptized — re-baptizing a validly baptized person is gravely illicit (CCC 1272).
Baptized Catholics: Those who were baptized Catholic as infants but never received catechesis and have not yet received Confirmation or First Eucharist. They complete their initiation through a separate process, often integrated with OCIA formation.

Each group participates in the same weekly sessions, but the liturgical rites they celebrate differ. The process respects the unique spiritual starting point of each person.

The Four Periods of OCIA

OCIA unfolds in four distinct periods, each separated by a liturgical rite that marks the transition from one stage to the next.

Period 1: Inquiry (Pre-catechumenate)

The Inquiry period is an open-ended time of exploration and questions. There is no formal commitment required — you are simply invited to come and learn. During Inquiry, you will meet with other seekers and a team of parish members to discuss basic questions: Who is God? Who is Jesus? What does the Catholic Church teach? Why do Catholics do what they do? This is a safe space to ask any question, express doubts, and explore whether the Catholic faith is right for you.

Inquiry typically begins in the summer or early fall, though many parishes accept inquirers at any time of year. There is no expectation that everyone who begins Inquiry will continue to the next stage. The process proceeds at each individual's pace.

Tip: You do not need to contact the parish in advance or fill out forms to begin attending Inquiry. Simply show up, or call the parish office if you want more information before your first visit.

Period 2: Catechumenate

The Catechumenate is the heart of OCIA. It begins with the Rite of Acceptance into the Order of Catechumens (for the unbaptized) or the Rite of Welcoming (for baptized candidates), which is celebrated publicly at Sunday Mass. Through this rite, the inquirer declares their intention to continue the journey, and the parish community pledges to support them.

During the Catechumenate, which typically runs from fall through early winter, participants engage in four dimensions of formation:

Catechesis (teaching): Systematic instruction in Catholic doctrine — the Creed, the sacraments, the moral life, and prayer. Participants study Scripture, the Catechism of the Catholic Church, and the teachings of the Magisterium.
Liturgical formation: Learning to participate in the Mass and the sacramental life of the Church. Catechumens attend Sunday Mass and are typically dismissed after the Liturgy of the Word to reflect on the readings together (since they cannot yet receive the Eucharist).
Moral formation: Exploring Catholic moral teaching and applying Gospel values to daily life. This includes topics such as the dignity of human life, the call to charity, the nature of sin and grace, and forming a well-ordered conscience.
Apostolic life: Learning to live as a missionary disciple through service, witness, and participation in the community life of the parish.

Period 3: Purification and Enlightenment

This intense period coincides with the season of Lent — the 40 days before Easter. It begins with the Rite of Election (also called the Enrollment of Names), which usually takes place at the cathedral with the diocesan bishop on the First Sunday of Lent. During this rite, the catechumens' names are inscribed in the Book of the Elect, and the bishop formally declares that they are chosen ("elected") to receive the sacraments at Easter.

During Lent, the Elect participate in three scrutinies — solemn rites celebrated at Sunday Mass on the Third, Fourth, and Fifth Sundays of Lent. The scrutinies are prayers of exorcism and healing, asking God to free the Elect from the power of sin and strengthen them for the sacraments they are about to receive. The scrutinies are not examinations or tests — they are liturgical prayers offered by the entire parish community on behalf of those preparing for initiation.

This period is a time of intensified prayer, self-examination, and spiritual preparation. Catechumens are also "presented" with the Creed and the Lord's Prayer — the two foundational texts of the Christian faith that they will profess and pray as Catholics.

Period 4: Mystagogy

Mystagogy (from the Greek for "leading into the mysteries") is the period after the Easter Vigil, lasting through Pentecost and ideally through the first year of the new Catholic's life. During Mystagogy, the newly initiated — called neophytes — reflect more deeply on the sacraments they have received, continue to grow in their understanding of the faith, and integrate more fully into the life of the parish. The neophytes sit together at Sunday Mass and are often recognized and welcomed by the community.

The Easter Vigil: The Culmination of OCIA

The Easter Vigil, celebrated on Holy Saturday evening, is the most solemn and beautiful liturgy of the entire Church year. It is at this Mass that catechumens normally receive the Sacraments of Initiation; baptized candidates may also be received into full communion at the Vigil, though their reception need not happen at this time and may take place at any point during the year. The Vigil includes four parts:

The Service of Light

The church is in total darkness. A new fire is lit, and from it the Easter candle (Paschal candle) is ignited. The deacon carries the candle into the dark church, chanting "Lumen Christi" ("Light of Christ"), and the congregation lights their individual candles from its flame. The Exsultet — the great Easter Proclamation — is then sung.

The Liturgy of the Word

Up to nine readings trace salvation history from Creation through the Exodus to the prophets and culminating in the Gospel of the Resurrection. These readings tell the story of God's plan for humanity — the very story the catechumens have been studying all year.

The Sacraments of Initiation

The catechumens profess the faith, renounce sin, and are baptized — by immersion or pouring of water. They are then clothed in white garments and presented with a lit candle. Immediately after baptism, they are confirmed by the priest (who, by canon 883 §2, has the faculty to confirm any adult he has just baptized) through the anointing with Sacred Chrism. Finally, they receive the Eucharist — Holy Communion — for the first time.

The Liturgy of the Eucharist

The newly baptized participate fully in the Eucharist for the first time, receiving the Body and Blood of Christ along with the rest of the faithful. This moment — the completion of initiation — is often deeply emotional for the neophytes, their sponsors, and the entire parish community.

Choosing a Sponsor

Each person going through OCIA is asked to choose a sponsor — a practicing Catholic who will accompany them on the journey. The sponsor attends weekly sessions with the candidate, prays for them, answers questions from their own experience of faith, and stands with them at the Easter Vigil when they receive the sacraments. The sponsor's role is similar to that of a godparent at baptism; in fact, the sponsor often serves as the person's godparent or Confirmation sponsor.

Per canon 874 of the Code of Canon Law, a sponsor must be a confirmed Catholic in good standing who has received the Eucharist, attends Mass regularly, lives a life consistent with the faith, is at least 16 years old, and is not the parent of the person being initiated. Many people choose a Catholic friend, family member, or coworker. If you do not know a Catholic who can serve as your sponsor, the parish will help match you with someone from the community.

What You Will Learn in OCIA

While the specific curriculum varies by parish, OCIA programs generally cover the major pillars of Catholic life:

The Creed: The foundational beliefs of the Catholic faith — the Trinity, the Incarnation, the Resurrection, the Church, the communion of saints, and the hope of eternal life.
The Sacraments: The seven sacraments (Baptism, Confirmation, Eucharist, Reconciliation, Anointing of the Sick, Matrimony, and Holy Orders), their meaning, and their place in Catholic life.
Moral Teaching: The Ten Commandments, the Beatitudes, Catholic social teaching, the dignity of human life, and forming conscience.
Prayer: The Our Father, the Hail Mary, the Rosary, Lectio Divina (prayerful reading of Scripture), and the rich tradition of Catholic spirituality.
Scripture: How Catholics read the Bible, the relationship between Scripture and Tradition, and the major themes of the Old and New Testaments.
The Mass: A detailed walk-through of the Mass — its structure, prayers, gestures, and meaning — so that new Catholics can participate fully and fruitfully.

How to Find OCIA at a Parish Near You

Nearly every Catholic parish in the United States offers OCIA in some form. Here is how to get started:

Find a parish: Search for Catholic churches near you and look for one that feels welcoming.
Call the parish office: Ask about their OCIA program (some still call it RCIA) — when it meets, when the next cycle begins, and whether you can attend an Inquiry session.
Just show up: Many parishes hold open Inquiry sessions throughout the year. You do not need to make a commitment to begin attending.
Attend Sunday Mass: Even before starting OCIA, attending Mass is one of the best ways to experience Catholic worship and begin to feel at home in a parish.

Tip: Most OCIA programs begin in September, but you can contact a parish at any time. Many parishes will welcome you into a group that is already meeting, and some offer year-round inquiry. Do not wait — reach out whenever you feel the call.

Frequently Asked Questions

What is the difference between RCIA and OCIA?

OCIA is the current name for what was previously called RCIA in the United States. The U.S. bishops approved the new translation in November 2021; the Holy See confirmed it on February 14, 2024; its use became obligatory on Ash Wednesday, March 5, 2025. The process is essentially the same — the renaming reflects a more accurate translation of the Latin original.

How long does OCIA take?

OCIA typically runs from September through the Easter Vigil, about 7 to 9 months. The rite itself does not specify a fixed timetable; the Catechumenate "should last long enough — several years if necessary." Baptized Christians often complete the process more quickly than unbaptized catechumens.

Do I need to be baptized to join OCIA?

No. Adult initiation accommodates unbaptized adults (catechumens), baptized non-Catholic Christians (received through a separate rite), and baptized Catholics who never received Confirmation or First Eucharist. Each group receives different sacraments.

Can I join OCIA if I am already married outside the Church?

Yes. If your marriage needs to be convalidated or an annulment is needed, the parish will help you explore your options pastorally. Marital situations should not discourage you from beginning inquiry.

Find a Parish with OCIA Near You

Search 19,000+ Catholic parishes to find a church near you. Call the parish office and ask about their OCIA program (or RCIA — many parishes still use the older term informally) to begin your journey.

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