The calculator that's actually right
UnionCraft is an educational paycheck and benefits calculator built from your local's official CBA, pension documents, and plan amendments — not estimates or industry averages. Members can verify every number against their real pay stub.
When the paperwork is ambiguous or an amendment hasn't made it into the official text, UnionCraft surfaces the discrepancy. It's the source of record for what your documents actually say — not what everyone assumes they say.
Educational calculator. Not financial advice. Not affiliated with any union.
1,170+
Calculation tests
100%
Numbers traced to source
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Verified against real stubs
26+
Source documents loaded
The source of record for what your documents actually say
Verified against real pay stubs. Tested against real Cerris Systems stubs and matched to the exact penny. When a discrepancy exists, we document exactly why — no hand-waving.
Catches what official documents miss. CBA text doesn't always reflect signed amendments. When a rate change is documented on paper but hasn't made it into the official text, UnionCraft tracks it — and surfaces the gap. Your numbers stay current even when the paperwork doesn't.
MO + KS withholding done right. Uses the employer withholding formula — not the income tax return formula. That distinction matters and it took digging through the right IRS and DOR publications to get it right.
Every number is sourced. Hover any calculation to see exactly where the rate or formula comes from — which plan document, which section, which page. Arithmetic only: what your union's documents define.
Everything a member needs in one place
No spreadsheets. No guessing. Accurate numbers your members can verify against their own pay stubs.
Paycheck Calculator
Enter hours worked — see exact gross, taxes, deductions, and net pay. Supports regular, overtime, double-time, and triple-time. Verified against real pay stubs.
Matched to real stubs, to the penny
Union Documents Hub
Searchable access to your CBA, pension SPDs, health & welfare plans, DC plan, and by-laws — including amendments not yet reflected in the official text. Full-text search and deep linking.
CBA, amendments, pension, health plans — all searchable
Retirement Forecast
See your 401(k) balance in 20 years. Compare election scenarios side by side. Includes employer DC contributions, compound growth projections, and pension benefit estimates.
NPF Schedule D + Local pension + 401(k) combined
Annual Projections
Week-by-week annual projections with accurate Social Security wage base tracking, 402(g) contribution limit warnings, and federal bracket analysis.
Not multiply-by-52 — real week-by-week accumulation
What-If Raise Allocator
When a new CBA raise hits, model how to allocate it: base pay, 401(k), health & welfare, pension. See the retirement impact of each dollar before you negotiate.
7 allocation buckets with retirement impact
DC Tax Benefit Tool
Show members the real cost of a DC election — pre-tax contributions cost less than face value. Interactive slider with live tax savings calculation and 20-year growth chart.
Every $1/hr DC costs ~$0.70 off the paycheck
See it in action
Slide the hours to see an estimated paycheck for a Local 8 Journeyman Plumber/Pipefitter. This is a simplified preview — the full app breaks down every deduction, tax, and fringe with sourced provenance for each number.
Try the full interactive demoHours this week
Estimated using Local 8 JM rates. Not financial advice.
How it works for your local
We configure everything to match your CBA, deductions, and benefit plans. Members log in, run their numbers, and can verify every figure against their actual documents.
We load your documents
Your CBA, pension documents, plan amendments, classifications, and fringe rates — all loaded from official sources and kept current. Members select their classification during onboarding.
Members verify their pay
Every week, enter hours and compare our calculation to the stub. If the numbers don't match, you have the sourced math to understand why — and the documentation to back it up.
Plan with confidence
Retirement projections, raise modeling, and contribution comparisons help members make informed decisions — grounded in what their actual documents say, not estimates.
Built on what your documents actually say
When members understand their pay and can verify the math, they trust their union more. When leadership has a sourced reference for every number, they can answer questions confidently.
The authoritative reference for your plan documents
CBA text doesn't always reflect the latest signed amendments. UnionCraft tracks what your documents actually say — including changes that haven't made it into the official printed text. When a member questions a number, there's a sourced answer.
CBA negotiation tool
Model how a raise gets allocated across base pay, pension, health & welfare, and 401(k). Show the membership exactly what each option means for their paycheck and retirement — before they vote.
Apprentice education
New apprentices often don't understand their deductions or benefits. The calculator and projection tools make it tangible — "here's what your 401(k) election actually costs you off the paycheck."
Pay stub verification
Catch payroll errors before they compound. Members enter their hours and compare our sourced calculation to the contractor's stub. Discrepancies surface immediately with the documented math to back it up.
See what accurate looks like
Try the demo with real Local 8 rates, then reach out to get your local's documents loaded. We're onboarding locals now.
Educational calculator. Not financial advice. Not affiliated with any union.