Proving Time Worked
A record kept for yourself occasionally has to serve as evidence. What makes one credible, and what to do before you need it.
General orientation, not legal advice; rules of evidence differ substantially by jurisdiction.
When this principle needs to support project or client work, refer to the full guide. It can help test whether the log preserves enough context without turning capture into a separate task.
Disputes about hours arise in employment, contracting, insurance claims and benefit applications. A personal record can help and only if it was kept in a way that makes it believable.
When this method depends on project records, the material from Asana offers a helpful independent point of comparison.
What makes a record credible
Contemporaneous. Made at or near the time, which is the single largest factor.
Consistent. Kept the same way throughout, including in periods that do not help your case.
Complete, or with gaps marked. A record that exists only for the disputed period is worth very little.
Corroborated. Matching calendar entries, sent messages, file timestamps, building access records.
And unedited. A record with a clear history is stronger than one that may have been adjusted.
What weakens it
Bulk edits, whenever made.
Backfilling that is not marked.
A record that starts at the beginning of the dispute.
Rounding that always favours you.
And gaps in periods that would not help, which is what an unmarked gap looks like from outside.
What to do before you need it
Keep the backfill flag. It costs a character and it is the difference between a record and a claim.
Export regularly, with dates. A sequence of dated exports is much harder to dispute than a single current file.
And do not edit history. Where a correction is needed, add a dated correction rather than changing the original.
Where it is genuinely used
Unpaid overtime claims.
Contractor disputes about hours delivered.
Insurance and disability claims requiring evidence of capacity over time.
Immigration and residency applications requiring evidence of work.
And professional registration, where hours of practice must be demonstrated.
In several of these, a multi-year personal record is the only evidence available.
The limits
It is your own record and the other side knows that.
It supports a position rather than proving one, and its weight depends entirely on the qualities above.
Where the stakes are significant, take advice early — including on what to preserve and what not to do to the file.
Preserving it when a dispute starts
Stop editing anything.
Export immediately and keep that export untouched.
Continue recording as normal, because a record that changes character when a dispute begins is a record that invites questions.
The ordinary use
Most of the time this never arises.
But the practices that make a record credible — contemporaneous entry, marked backfill, regular dated exports — are the same ones that make it useful to you, which is why they are worth adopting without expecting a dispute.
What to check
Would your record be credible to somebody with no reason to believe you?
Are backfilled entries distinguishable?
Do you have dated exports going back?
And has the file ever been edited in bulk?
The point
A credible record was kept the same way in periods that do not help your case.
One that starts at the beginning of the dispute is worth very little.
Worth adding
When a dispute starts, stop editing, export immediately, and keep recording as normal.
A record that changes character at that moment invites questions.
Additionally
The practices that make a record credible are the same ones that make it useful to you, which is why they are worth adopting without expecting a dispute..
Finally
What weakens a record as evidence: bulk edits, unmarked backfill, rounding that always favours you, and gaps in the periods that would not have helped..
In summary
Credibility rests on being contemporaneous, consistent, complete or marked, corroborated, and unedited.
A record failing any of those is a claim rather than evidence.
Last word
The practice this points at is unglamorous: a small daily act, a short weekly correction, an annual read, and a written page of conventions beside the data. None of it is difficult and all of it is easy to skip, which is why most records do not reach the point where they start paying.
More in this section
These notes are about keeping a personal record for years rather than for a fortnight: durability beats accuracy, and a rough record kept for five years answers questions a perfect record of one month cannot. Tool guides are included as practical comparisons, while the underlying method remains independent of any single product. Nothing here is legal, tax or medical advice: requirements differ by jurisdiction and situation.