Modernization and migration

Legacy system modernization

Replacing spreadsheets and legacy plan administration systems one process at a time, with parallel runs and reconciled balances.

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At a glance

What it is
Replacing spreadsheets and ageing 401(k), TPA or recordkeeping systems with maintainable software, without losing history.
Approach
Phased replacement, one process at a time, planned around your plan-year calendar.
Safety net
Old and new run side by side on real plan-year data until results and balances agree.
Data
Historical data mapped, loaded and reconciled by plan, source and fund.
Who it is for
TPAs and recordkeepers with home-grown systems, spreadsheet-heavy processes or a platform change ahead.
Limits
Cut-over dates are set by your team; we avoid year-end testing and filing peaks.
Signs it is time

When a legacy system holds you back

Re-keying between tools

The same census or payroll data typed into testing, forms and billing separately.

Knowledge in one head

Only one person understands a spreadsheet or old system, and they are busy every year-end.

Rule changes are painful

Each new limit or SECURE 2.0 change means risky edits to code or formulas nobody wants to touch.

No audit trail

You cannot show who changed a number, when, or why.

Owner blind spots

Workload and deadlines are tracked outside the system, so the owner cannot see risk early.

Platform change ahead

You are moving plans between recordkeeping platforms and need balances to match on day one.

How we modernize

  1. Inventory. List every process, report and data flow the old system or spreadsheet handles, including the unofficial ones.
  2. Map the data model. Document how plans, participants, sources and transactions are stored today.
  3. Replace one slice. Start with the process that costs the most manual time, such as census intake or billing.
  4. Run in parallel. Old and new process the same real plan-year data in your environment; differences are explained before switching.
  5. Migrate and reconcile. Historical data is loaded and reconciled by plan, source and fund.
  6. Retire. The old piece is switched off only when your team agrees.
Proof

Work you can check

A US TPA: key financial process automated

A six-month build of a complex financial application for The Retirement Advantage, Inc. (TRA), which in the client's words drastically reduced the manual effort in a key financial process.

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Revenue management software for 401(k) firms

Development of Expand Financial's software that automates revenue management for recordkeepers, TPAs and payroll processors.

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KinetiPlan, our own TPA operating system

Plans, census, annual projects, compliance testing, a recordkeeping ledger, payroll intake and billing in one product. Working pilot build with synthetic data.

Read more
Modernization FAQ

Modernization questions

Something else on your mind? Ask us directly.

Piece by piece. We replace one process at a time, run old and new side by side on real plan-year data in your environment, and switch over only after the results and balances agree.

Yes. We turn the logic in your spreadsheets into tested, traceable workflows, keeping the parts your team relies on and removing the re-keying.

It is mapped and loaded into the new model with reconciled totals, and kept available for reporting and audit. Nothing is discarded without your sign-off.

It depends on how many processes and plans are involved. We agree a first milestone during discovery so you see working software early, then plan the rest around your plan-year calendar and avoid year-end crunch periods.

Related

More on 401(k) software

TPA software development

Plan administration systems for US third-party administrators: plan years, census, testing, 5500 data and billing.

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Recordkeeping software development

Participant, source and fund ledgers, contribution posting, loans, distributions and reconciliation.

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Compliance testing automation

ADP/ACP, top-heavy, coverage and annual limit checks that trace every result back to census rows.

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Let's build together

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401(k) / TPA solutions

See our work in KinetiPlan

A TPA operating system we built for independent US retirement plan administrators: compliance testing, recordkeeping ledger, payroll intake, projects and billing in one place.