401(k) contribution reconciliation check.
A quick triage tool for contribution processing. Enter the total from the payroll source file, the total actually posted, and the variance your process allows. The result tells you whether the batch is within your threshold or needs review.
Illustrative estimates only. Results do not determine eligibility, legal compliance, tax treatment or required corrective action.
Contribution reconciliation check
Compare a source-file total with a posted total. Use the result as a simple triage signal; a non-zero variance requires investigation, not an automatic conclusion.
A variance can have multiple causes; confirm units, timing, file scope, and transaction status.
The math behind the result
Variance
Source total minus posted total. A positive number means less was posted than the source file shows.
Variance %
The absolute variance divided by the source total.
Status
Within threshold when the absolute variance is at or below the review threshold you enter; otherwise review.
Good uses
- A final check before a payroll batch is approved for posting
- Spot-checking a remittance against what reached the trust account
- Training new staff on what a reconciliation control should catch
What it does not do
- It compares totals only; offsetting errors at participant level can hide inside a matching total
- It does not explain the cause of a variance, which can come from timing, file scope, units or transaction status
- A zero threshold is the strictest setting; agree any tolerance with your control owners
Frequently asked questions
What causes a contribution variance?
Common causes include a file that covers a different pay period, rejected or pending rows, loan repayments mixed with deferrals, rounding, and transactions that have not settled yet.
Should the threshold ever be above zero?
Some teams allow a small tolerance for rounding. Any tolerance should be documented and approved, and every variance above it should be investigated and resolved with notes.
How does this relate to the ledger?
In a full process, the posted total comes from the recordkeeping ledger, and any variance becomes an exception with an owner and a resolution trail.
Related tools and guides
Census validation tool
Upload a synthetic or de-identified 401(k) census CSV and get an instant exception report. Processing stays in your browser; nothing is sent to a server.
Operations ROI estimator
Free calculator for TPAs: estimate the staff hours and labor capacity released when repetitive 401(k) processing takes less time per batch.
Section 415(c) annual additions limit checker
Check a participant's 401(k) annual additions against the Section 415(c) limit: the lesser of the dollar limit or 100% of compensation. Default 2026 limit $72,000.
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