The problem
The work keeps growing. The labor pool doesn't.
The TPAs we know are fighting the same battle: more plans, tighter deadlines, and experienced administrators getting harder to find and keep. Busy season becomes burnout season, and growth starts to feel like a threat instead of a win.
TPA Stack exists so the work gets done accurately, on time, and without grinding down the team you already have.
Who we help
Built for firms like yours
Most common
Growing independent TPAs
Add experienced capacity without the long runway of hiring and training. Protect your team from busy-season burnout.
Larger established firms
Outsourcing with less friction and less hand-holding. Strong continuity, clear communication, and real depth in DB and actuarial work. Outsourcing for established firms
Pension actuaries & DB teams
Valuations, cash balance and defined benefit support from people who actually do this work, reviewed under enrolled-actuary oversight. Defined benefit & actuarial support
Core services
What we take off your plate
Full production support across the plan types and tasks that eat your team's time.
Back-office production support
The day-to-day production load, data, reconciliations, testing prep and more, handled by a dedicated team trained on your workflow.
Specialist depth
Defined benefit & cash balance administration
Full DB and cash balance administration plus valuations and actuarial support, reviewed under enrolled-actuary oversight. Real specialists, not generalists learning on your plans.
Why we're different
Outsourcing that feels in-house
No layer in between
Real people, direct access
No layers of account management, no ticket portals. You communicate directly with the people handling your plans, trained on your standards and part of your firm, like a department down the hall.
No account managers • No ticket queues
Overnight progress
Files keep moving after your day ends. Send work at 5 p.m., review it ready at 9 a.m.
Continuity you can count on
Our shadow-team model builds bench strength behind every role, so growth or turnover never forces a reset.
U.S.-guided oversight
Training, quality review and information security stay anchored on the U.S. side.
What partners say
How it works
Getting started is simpler than you think
01
Discovery
Tell us where the pressure is.
02
Meet your team
The people who'll do the work.
03
Onboarding
Trained on your software & standards.
04
Direct relationship
No queues, no telephone game.
05
Scale as needed
Start small, grow from there.
Most firms start small, a handful of plans, and grow from there.
Our story
Built inside a working TPA
TPA Stack didn’t start as an outsourcing company. It started as a working solution inside Cornerstone Retirement, a U.S. TPA facing the same capacity crunch you are. The model worked so well it became a business. We don’t just sell this service, we run our own firm on it.
Why put off till tomorrow what can be done overnight?
Tell us where the pressure is. We'll tell you honestly how we can help and what it would look like.