What causes reconciliation discrepancies?

Last reviewed 2026-07-02

Discrepancies come from a handful of recurring sources: timing differences, fees and adjustments, errors and duplicates, missing transactions, and outright underpayments. Some are benign timing that clears itself; others are real money to recover. Reconciliation exists to tell them apart.

At a glance

Timing differences are benign and clear on their own, like deposits in transit or uncleared items.
Fees, refunds, and adjustments explain many gaps but hide overcharges among them.
Duplicates, missing transactions, and underpayments are real money to recover.
The job is separating explainable differences from recoverable ones.

Timing differences

The most common and least worrying cause. A payment is recorded on one side before it lands on the other: a deposit in transit, a check not yet cleared, a payout initiated but not settled. These reconcile themselves in the next period and just need to be identified so they are not mistaken for errors.

Fees, refunds, and adjustments

Processors and counterparties net fees, refunds, disputes, and adjustments into balances. Most are legitimate, but this is where overcharges hide: a fee above the contracted rate, a refund deducted twice, a dispute never reversed. They look like ordinary adjustments until each is checked against what was agreed.

Errors, duplicates, and underpayments

The recoverable bucket. The same transaction invoiced or charged twice, a payment that never arrived, an amount that landed short of what was owed, a credit or discount never applied. These do not clear themselves and do not show up as obvious errors, which is why line-by-line matching is what surfaces them.

Common questions

Which discrepancies are worth chasing?

The ones that do not clear on their own: short-pays, missing payments, duplicates, overcharges, and unapplied credits. Timing differences are noted and left to clear.

Why do small discrepancies matter?

Individually they are easy to ignore, which is exactly why they persist. Across enough volume the long tail of small differences adds up to real, recoverable money.

How do you tell a timing difference from a real one?

A timing difference resolves in the next period as the pending side lands. If a difference persists past when it should have cleared, it is an error or a shortfall, not timing.

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