Explore the value of a private Catholic high school education

Whether your teen is entering 9th grade or considering a transfer, you know that it’s important to make the right choice for high school. Your teen’s learning environment will powerfully impact how they view themselves and their place in God’s world.

At St. Thomas Aquinas High School, we recognize how crucial these years are for your teen. As the top private high school in the Seacoast region, our approach to education is deeply rooted in academic excellence and Catholic values — equipping students for success in college and beyond.

We invite you to explore the value of an STA education, as well as tuition rates and financial assistance options.

How Your Child Can Benefit From an STA Education
Affording STA
Tuition Rates
Frequently Asked Questions

Simplify your search for the right private high school.

How Your Child Can Benefit From an STA Education

Prepared for college and for life

There’s no greater feeling than knowing that you’ve made the right investment in your teen’s education. At STA, we partner with parents to provide an education that prepares high schoolers for college and life.

Why do families choose STA?

Catholic Values

Expect a community where your child will be nurtured with Catholic values and morals. They will understand the world in light of the Gospel, serve others wholeheartedly, and grow in faith and integrity.

College Prep Education

Your teen will find an education that prepares them for a bright future. Through a challenging curriculum, AP and Honors courses, as well as real-life career path immersions through Winterterm, STA students are equipped for college and beyond.

Engaging Extracurriculars

Students are offered many opportunities to grow. They build friendships and learn valuable life skills through electives, fine arts, athletics, clubs, and other enriching activities.

Affording STA

Financial assistance, discounts, and financial ASSISTANCE options

Perhaps one of the biggest considerations you’re thinking of as a parent is the cost of private high school. At STA, we’re committed to making private high school education accessible for you and your family. There are many avenues for you to explore as you consider applying to our school:

Financial Assistance

Families can apply for financial aid online through FACTS. As you fill out the online application, you’re required to submit the following:

  • A copy of the IRS taxes from the previous two years of your school year enrollment (ex. 2021 IRS taxes for SY 2023-2024).
  • A copy of your W-2 from the previous two years of your school year enrollment (ex. 2021 W-2 for SY 2023-2024).
  • Other personal background information relevant to determining financial aid

Did you know…

The average financial asssitance awarded to families is approximately
$7,500 per year.

The average financial assistance awarded to families is approximately $7,500 per year.

One in three families receives financial assistance from STA.

The FACTS website requires a $40 application fee upon submission. If you have any questions, please get in touch with FACTS at (866) 441-4637.

Scholarships

We are thrilled to announce we are offering 16 scholarships this year! Please view our 2025-2026 Scholarship Details to learn about each of the scholarships and determine which ones you may be eligible for.

Please read each description carefully as some may have additional application requirements (supplemental essays and teacher recommendations). For the teacher recommendations, please make sure to give any teacher at least 2-3 weeks notice to write a recommendation on your behalf.

Applications are due by Sunday, January 12th at 11:59 PM.

Any questions, please reach out to Mrs. Bolduc at sbolduc@stalux.org.

Discounts and Payment Plans

Payment plans

STA families have four options for paying tuition: A single payment, a semi-annual payment, a 10-month payment plan, and a 12-month payment plan.

“We were fortunate enough to experience St. Thomas Aquinas High School 12 years ago with Elizabeth and can’t say enough wonderful things about STA. It prepared Elizabeth above and beyond what we could have ever dreamed of for college and helped make her who she is today. We love being able to send our children to a school that promotes the same values as we do at home and reiterates our faith as well.”

– Felicia Rose, STA Parent

Tuition Rates

Learn all about our current tuition rates and fees

Tuition Rate, 2024-2025
Grade LevelTuition*
Grades 9-12$18,644**

*Exclusions from the tuition: Uniform, laptop, school supplies, calculator, AP exam & SAT costs, parking fees, student activities such as Winterterm and other events.

**There is also a student fee of $425 required annually during enrollment.

Frequently Asked Questions

Yes, we encourage all families to apply to see what they may qualify for.

You may apply for financial aid or pay out of pocket.

Tuition payments start June 1 for the upcoming year.

Yes! You may contact our Comptroller, Sarah Lescault, at slescault@stalux.org.

Visit St. Thomas Aquinas High School

As you find the best choice for a private high school in Dover, NH, and surrounding communities, we’d like you to get a full view of what STA offers. Learn more about our college-prep programs, uplifting community, and distinct school culture where your teen can thrive. We can’t wait to meet you and your family!

Visit Us

Ready to apply? Click here to start your online application.
Questions? Please get in touch with us at (603) 742-3206 or sbolduc@stalux.org for financial assistance and tuition-related questions.