Administer 401(k), 403(b), 457(b), Defined Benefit, and Pooled Employer Plans from a single, audit-ready system built for TPAs, sponsors, and recordkeepers. The current state: retirement administration lives in too many places If you administer employer-sponsored retirement plans for a living, you already know the shape of the work. A single plan touches recordkeeping , contribution processing , compliance testing , participant management , government filings, and year-end reconciliation. Multiply that by dozens or hundreds of plans, each with its own document, eligibility rules, vesting schedule, and payroll feed, and the operational surface area becomes enormous. Today, most third-party administrators (TPAs), plan sponsors, and recordkeepers stitch this together from a patchwork of tools. A recordkeeping ledger sits in one system. Compliance tests run in spreadsheets or a separate testing engine. Contribution files arrive by email, SFTP, or a payroll portal and a...
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RetireCore 403(b): Administration Built for Nonprofits and Schools
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Universal availability, multiple vendors and contracts, contract exchanges, and the 15-year special catch-up — administered correctly, from one audit-ready platform built for TPAs, sponsors, and recordkeepers.
Four ERISA Segments
ERISA, non-ERISA, public-school and church plans in one configurable engine.
Universal Availability
Actively monitored for "once-in-always-in" — not just documented.
Multi-Vendor Recordkeeping
True source-level balances reconciled across every approved vendor.
Contract Exchanges
Modeled as non-taxable and gated on an active information-sharing agreement.
15-Year Special Catch-Up
The three-prong decomposition, layered correctly with the age-50 catch-up.
Honest, Segment-Aware Testing
ADP shown exempt; only the tests that actually apply are run.
The current state: 403(b) plans are administered like they're 401(k) plans wearing a different label
The 403(b) plan is one of the largest and least understood corners of the retirement industry. It exists to serve public schools, colleges and universities, hospitals and healthcare systems, churches and religious organizations, and other 501(c)(3) tax-exempt employers. On paper, it looks similar to a 401(k): employees defer part of their salary, the employer may contribute, and the money grows tax-deferred until retirement. In practice, a 403(b) plan runs on a genuinely different rulebook, and most of the software administering it was never built for that rulebook in the first place.
A huge share of 403(b) administration today happens on platforms and processes that were designed for qualified 401(k) plans and then adapted — sometimes just relabeled — to handle 403(b) business. That mismatch is not cosmetic. A 401(k)-shaped system assumes a single recordkeeping ledger per plan, a straightforward ADP/ACP nondiscrimination test, and a distribution model where money either stays in the plan or leaves it. None of those assumptions hold cleanly for a 403(b) plan.
Historically, many 403(b) arrangements — especially in K-12 and higher education — allowed participants to choose among multiple approved vendors, each holding its own annuity contract or custodial account for that participant. A single plan sponsor might have relationships with several insurance carriers and mutual fund companies, each maintaining its own records for the participants who chose it. Layer on four distinct regulatory categories — ERISA-covered plans (typically hospitals and other 501(c)(3) employers), non-ERISA plans (deferral-only arrangements exempt from Title I), public school plans (governmental, and therefore not subject to ERISA at all), and church plans (which carry their own exemptions) — and the operational picture becomes four different rulebooks hiding inside what most people call "the 403(b) plan."
Administrators and TPAs handling this today typically stitch it together from spreadsheets, vendor statements, and manual cross-checks. Someone has to track which vendor holds which participant's balance, whether the plan is ERISA or non-ERISA, whether a given employee has actually been offered the plan under the universal availability rule, and whether a distribution requested from one vendor is actually a taxable event or simply money moving between contracts. It is exacting, detail-heavy work, and it is still done largely by hand.
The pain point: the mistakes that are unique to 403(b) administration
Because a 403(b) plan is not a qualified plan under the Internal Revenue Code in the same way a 401(k) is, applying 401(k) logic to it does not just create inefficiency — it creates wrong answers. Here is where the friction and the real compliance risk concentrate:
Universal availability. With narrow exceptions, if an employer allows any employee to make elective deferrals, it generally must allow all employees the same opportunity, including part-time employees. There is no ADP test to catch a coverage failure the way a 401(k) plan has one — instead, the plan has to affirmatively track who was offered the plan and when. A part-time employee who quietly crosses the hours threshold and becomes eligible, but is never notified, is a classic "once-in-always-in" violation that a 401(k)-shaped system has no mechanism to catch.
Multiple vendors and contracts. When participants hold accounts with several approved vendors, the plan sponsor or TPA needs a consolidated, accurate picture of each participant's total position across all of them — for limit monitoring, for testing (where applicable), and for reporting. A system built around one ledger per plan struggles to represent that reality honestly.
Contract exchanges and plan-to-plan transfers treated as distributions. A 403(b) participant can exchange an annuity contract for a custodial account with a different approved vendor, or transfer their balance to another employer's 403(b) plan, without that movement being a distribution at all. No 1099-R should be issued, no early-distribution penalty applies, and the money should not count against the participant's annual contribution limit. A system that does not model these transactions correctly can generate an incorrect tax form for money that never left the retirement system.
Information-sharing agreements (ISAs). Contract exchanges and vendor-to-vendor transfers generally depend on an active information-sharing agreement between the plan and the receiving vendor. Without a way to track which vendors have an ISA in place, an exchange can be processed that should have been blocked.
The 15-year special catch-up. Employees of qualified organizations (which includes many 403(b) sponsors such as hospitals, schools, and churches) with at least 15 years of service may be eligible for an additional catch-up contribution on top of the standard age-50 catch-up. It is calculated as the least of three separate limits, and it has to be layered correctly with the regular deferral limit and the age-based catch-up without double-counting. Getting the ordering wrong risks an excess deferral.
Segment-dependent testing. Whether ADP, ACP, top-heavy, or Form 5500 filing apply at all depends on which of the four 403(b) segments — ERISA, non-ERISA, public school, or church — the plan falls into. A governmental public-school plan is not subject to ERISA and has no ACP test; a church plan carries its own exemptions; a deferral-only non-ERISA plan avoids both ACP and the 5500 filing. A generic engine that always runs the same battery of qualified-plan tests will either run tests that do not apply or, worse, skip ones that do.
The cost of these mismatches is not abstract. A misclassified part-time employee, a contract exchange coded as a taxable distribution, an over-limit deferral from a miscalculated 15-year catch-up, or a nondiscrimination test that never should have run — each one can mean corrections, amended filings, and real exposure for the plan sponsor as a fiduciary. And because 403(b) sponsors are so often schools, hospitals, and religious organizations with lean administrative staff, there is often less specialist bandwidth to catch the error before it compounds.
RetireCore for 403(b): a genuine 403(b) engine, not a 401(k) with the labels swapped
RetireCore from HolyByte Innovations is an enterprise retirement plan administration platform, and its DC 403(b) build exists specifically because a 403(b) plan deserves its own rules engine rather than a repurposed 401(k) one. Underneath the product sits a dedicated 403(b) rules engine that understands all four regulatory segments — ERISA, non-ERISA, public school, and church — behind a single plan configuration. Set the segment once, and every downstream screen, compliance test, form, and notice adjusts to that plan's actual rulebook.
The platform runs entirely on the administrator's own machine, so participant data — names, balances, contract information — never leaves it. For hospitals and universities managing sensitive participant data under their own security obligations, that is a genuine privacy advantage over a hosted, multi-tenant platform.
RetireCore 403(b) is built for the people who carry the operational weight of this plan type: TPAs who specialize in 403(b) business or administer it alongside 401(k) and 457(b) plans, plan sponsors at hospitals, universities, school districts, and religious organizations who need clean records and defensible compliance, and recordkeepers who need to reconcile activity across a multi-vendor environment.
Key features for 403(b) administration
Every feature below reflects a rule that is genuinely specific to 403(b) plans, not a generic retirement-plan capability with a 403(b) label attached.
Four segments, one engine
A 403(b) plan is configured as ERISA, non-ERISA, public school, or church, and that single choice drives every rule downstream. An ERISA plan runs ACP testing and files a Form 5500; a deferral-only non-ERISA plan does neither. A public-school plan is governmental and exempt from ACP and top-heavy, but is still subject to universal availability. A church plan carries its own exemptions on top of that. Because the segment lives in the plan configuration rather than being assumed, a COLA update or a corrected citation is a single edit that applies correctly across every plan the firm administers, instead of four separate manual corrections.
Universal availability, monitored — not just documented
Rather than relying on a spreadsheet to remember who has been offered the plan, RetireCore scans for impermissible exclusions and for "once-in-always-in" situations — the part-time employee who has quietly crossed the applicable hours threshold and now has to be offered the opportunity to participate. Because there is no ADP test to serve as a backstop in a 403(b) plan, catching this correctly is the compliance mechanism, not a supplement to one.
The real 403(b) compliance suite
Compliance testing reflects what actually applies to the configured segment. ADP shows as an honest, cited exempt row rather than a fabricated pass, because a 403(b) plan does not have an ADP test. ACP runs only where the segment requires it — typically ERISA plans — and shows exempt on a church or public-school plan. Top-heavy testing, which never applies to a 403(b) plan, is marked accordingly. §402(g) and §415 limit monitoring runs against the plan's real deferral and contribution history, including the three-prong 15-year special catch-up decomposition for qualified-organization employees with 15 or more years of service, computed and layered correctly with the age-50 catch-up rather than stacked incorrectly on top of it. Where career-deferral history needed to compute that catch-up is missing, the system conservatively grants zero additional catch-up and flags the participant for review, rather than risk an over-limit deferral.
Money movement that respects the 403(b) exchange rules
Contract exchanges and plan-to-plan transfers are modeled as exactly what they are: not distributions. No 1099-R is generated, no early-distribution penalty applies, existing distribution restrictions on the money carry over to the new contract, and the incoming balance does not count against the participant's annual contribution limit. A contract exchange is gated on an active information-sharing agreement, tracked in a dedicated ISA register, so an exchange cannot be processed with a vendor that does not have one in place. In-plan Roth conversions are handled as the balance-neutral, taxable events they are — posting the correct 1099-R code without triggering a penalty.
Recordkeeping across multiple vendors and contracts
Where a plan's true source-level balances are held by a recordkeeper across multiple vendors — pre-tax, Roth, after-tax, match, and rollover money — RetireCore lets an administrator enter or bulk-upload those true balances, validating every split against the participant's total so the confirmed figures still satisfy the reconciliation to the penny. Source-specific distributions then draw from the correct bucket rather than an approximation.
The full transaction lifecycle
Distributions, loans, hardship-style unforeseeable-need withdrawals, terminations, and rollovers are all processed through a straight-through pipeline: a participant request generates the correct withholding and tax forms, the signed paperwork is verified, and once approved, the balance updates and a ledger entry posts automatically. Loans cover the full lifecycle, including delinquency cure and deemed distributions with the correct tax coding when a loan goes into default.
Verified to the penny
Because money in a 403(b) plan moves between vendors as well as in and out of the plan, reconciliation has to account for every one of those movements. RetireCore's Live Participant Reconciliation checks source data, contributions, distributions, loan activity, forfeitures, and the net of every transfer against the ledger for every participant, and the check is wired into the platform's own automated test suite so it cannot silently break.
Honest AI for document verification
Signed distribution and exchange paperwork can be verified using a free, in-browser OCR tier that flags documents for human review, or an optional tier using the administrator's own API key that can auto-approve high-confidence documents. When verification cannot be run with confidence, the system says so honestly and routes the item to manual review — a manual approval is always logged as manual, never presented as an automated pass.
Configured, not hardcoded
Plan identity, the written-plan-document adoption date, the universal-availability notice date, the qualified-organization flag that governs 15-year catch-up eligibility, and loan policy are all set once in plan configuration and flow onto every calculation, letter, and form. IRS limits live in a year-keyed table an administrator updates when new figures are released, with no code change required.
Watch the RetireCore 403(b) demo
Who it is for, and how it changes the day-to-day
Consider a TPA administering 403(b) plans for a mix of hospital systems, school districts, and universities, each with a different regulatory segment and its own set of approved vendors. In the fragmented model, every distribution request means figuring out — by hand, from memory or a reference sheet — whether this particular plan runs ACP, whether this participant qualifies for the 15-year catch-up, and whether this transfer is actually a distribution or simply money moving between contracts. A wrong answer on any of those questions can mean an incorrect tax form or a missed compliance obligation.
With RetireCore, the segment is set once per plan and every subsequent action — testing, transaction processing, form generation — reads from that configuration instead of relying on an administrator's memory. Contract exchanges route through the ISA gate automatically. The 15-year catch-up decomposition runs the same way every time, for every eligible participant. Universal availability is actively monitored rather than assumed. The result is a book of 403(b) business that can grow — more plans, more vendors, more segments — without the operational risk growing in lockstep with it.
Frequently asked questions
Is a 403(b) plan really that different from a 401(k) plan?
Yes, in ways that matter for administration. A 403(b) plan has no ADP test; instead, it is governed by the universal availability rule. It can involve multiple vendors and contracts for a single participant. Contract exchanges and certain transfers are not distributions. And whether testing or Form 5500 filing applies at all depends on which of four regulatory segments — ERISA, non-ERISA, public school, or church — the plan falls into.
How does RetireCore handle universal availability?
RetireCore actively scans for impermissible exclusions and for "once-in-always-in" situations, such as a part-time employee who has crossed the applicable hours threshold and must now be offered the plan. Because there is no ADP test to catch a coverage problem after the fact in a 403(b) plan, this active monitoring is the compliance mechanism itself.
Does RetireCore support multiple vendors and contract exchanges?
Yes. RetireCore models contract exchanges and plan-to-plan transfers as the non-taxable events they are — no 1099-R, no penalty, distribution restrictions carried over, and no impact on the annual contribution limit — and gates exchanges on an active information-sharing agreement tracked in a dedicated register. It also supports entering or uploading true source-level balances across the vendors a recordkeeper reports.
What is the 15-year special catch-up, and does RetireCore calculate it?
Employees of qualified organizations with at least 15 years of service may be eligible for an additional catch-up contribution beyond the standard age-50 catch-up, calculated as the least of three separate limits. RetireCore performs that three-prong decomposition per participant and layers it correctly with the standard catch-up, defaulting conservatively to zero additional catch-up and flagging the participant when the career-deferral history needed for the calculation is missing.
Which compliance tests actually run on a 403(b) plan in RetireCore?
It depends on the plan's configured segment. ADP never runs on a 403(b) plan and is shown as an honest exempt row. ACP runs only for ERISA-segment plans. Top-heavy testing never applies to a 403(b) plan. Universal availability monitoring and §402(g)/§415 limit checks, including the 15-year catch-up, run regardless of segment.
How do we see RetireCore 403(b) in action?
RetireCore is an enterprise platform, so the best next step is a guided demo tailored to your plan lineup and vendor structure. Reach out through our contact page and we will walk your team through the 403(b) workflows that matter most to you.
This article is general information about retirement plan administration and the RetireCore platform. It is not legal, tax, actuarial, or compliance advice. Regulatory citations are provided for convenience and should be verified against current IRS, DOL, and ERISA guidance. Compliance-critical output should be reviewed by a qualified TPA, ERISA counsel, or CPA before you rely on it for a filing.
Ready to simplify 403(b) plan administration?
See how RetireCore handles universal availability, multiple vendors, contract exchanges, and the 15-year catch-up in one compliant platform.
ADP/ACP, top-heavy, 402(g) and 415 limits, safe harbor, Roth, vesting and force-outs — administered from a single audit-ready platform built for TPAs, sponsors, and recordkeepers. ADP/ACP & Top-Heavy Testing Run §401(k) nondiscrimination and §416 tests against a clean, current census. Recordkeeping & Reconciliation Live participant reconciliation that ties to the penny before any filing. Loans, RMDs & 1099-R The full transaction lifecycle with correct withholding and tax codes. Safe Harbor & Roth Eligibility, vesting and money sources driven straight from the plan document. Daily NAV Pricing 4PM-cutoff valuation with connectors to major custodians and recordkeepers. Audit-Ready & Private A tamper-evident trail, running entirely on your own machine. The current state: 401(k) administration is many disconnected jobs pretending to be one The 401(k) is the workhorse of the American retirement system, and administering one is deceptiv...
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Administer 401(k), 403(b), 457(b), Defined Benefit, and Pooled Employer Plans from a single, audit-ready system built for TPAs, sponsors, and recordkeepers. The current state: retirement administration lives in too many places If you administer employer-sponsored retirement plans for a living, you already know the shape of the work. A single plan touches recordkeeping , contribution processing , compliance testing , participant management , government filings, and year-end reconciliation. Multiply that by dozens or hundreds of plans, each with its own document, eligibility rules, vesting schedule, and payroll feed, and the operational surface area becomes enormous. Today, most third-party administrators (TPAs), plan sponsors, and recordkeepers stitch this together from a patchwork of tools. A recordkeeping ledger sits in one system. Compliance tests run in spreadsheets or a separate testing engine. Contribution files arrive by email, SFTP, or a payroll portal and a...
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