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Tax Guide
Are Bank Statements Proof of Gambling Losses?
If you're trying to deduct gambling losses on your taxes, bank statements can help — but they're not enough on their own. Here's what the IRS actually requires, and how to document your losses properly.
March 6, 2026 · 5 min read
Tax disclaimer: This article is for general informational purposes only and does not constitute tax, legal, or financial advice. Tax rules change frequently. Consult a licensed CPA or tax attorney regarding your specific situation before filing any tax return or taking any deduction.
Quick answer
Bank statements are supporting evidence, not primary proof. The IRS requires a gambling diary or log as the core documentation. Bank statements — ATM withdrawals at casinos, deposits from gambling platforms — corroborate that log. Without a diary, bank statements alone are generally not sufficient to sustain a gambling loss deduction.
What the IRS requires to deduct gambling losses
Under IRS Publication 529 and IRC Section 165(d), gambling losses are deductible — but only as an itemized deduction on Schedule A, and only up to the total amount of gambling winnings you report for the year. You cannot deduct losses that exceed your winnings, and you cannot carry forward excess losses.
The IRS requires you to maintain adequate records. According to IRS Publication 529, adequate records for gambling include:
PRIMARY
Gambling diary or log
Maintained contemporaneously (at the time, not reconstructed later). Must record: date, type of gambling, establishment name and address, companions present, and amount won or lost per session.
PRIMARY
Casino win/loss statement
Many casinos provide annual statements through their player loyalty programs. These are strong supporting documents, though not always perfectly accurate.
PRIMARY
Form W-2G
Issued by casinos for winnings over reporting thresholds. Shows gross winnings and any withholding — required to be reported as income.
SUPPORTING
Bank statements
Support the diary by showing ATM withdrawals at casino locations, transfers to/from gambling accounts, and overall cash flow. Corroborating, not primary.
SUPPORTING
ATM/credit card receipts
Show cash withdrawn at gambling locations. Useful supplement to the diary but don't prove the money was lost gambling.
SUPPORTING
Online gambling account history
Session histories, deposit/withdrawal records from gambling platforms. Very useful for online gambling documentation.
How bank statements help your case
While bank statements alone are not enough, they're valuable supporting documentation when they clearly show gambling-related activity:
ATM withdrawals at casino addresses
Shows you were physically present and withdrew cash at a known gambling location on a specific date — corroborates diary entries.
Deposits from gambling platforms
DraftKings, FanDuel, BetMGM deposits on your statement confirm the gambling relationship and can be matched against reported winnings.
Wire transfers to gambling accounts
Deposits to online gambling platforms show funding activity that can be reconciled against platform win/loss statements.
Absence of other explanations for cash use
If you withdrew $2,000 cash at a casino ATM and the diary shows a $2,000 loss that session, the statement and diary together tell a consistent story.
What doesn't hold up in an audit
- Bank statements showing cash withdrawals at non-casino locations (gas stations, ATMs near casinos) — don't prove gambling
- Large cash withdrawals with no diary to show what the cash was used for
- Reconstructed gambling logs written after the fact with no contemporaneous records
- Claiming losses that far exceed your reported income without very strong documentation
- Online gambling losses without any platform account history or download of session data
- Casino player card history that contradicts the amounts in your diary
How to document gambling losses going forward
1
Keep a session-by-session log
Record every gambling session: date, location, type of game, starting and ending amounts. Do this the same day — not weeks later. A simple notes app or spreadsheet works.
2
Use a player's loyalty card
Sign up for every casino's loyalty program. Your card tracks buy-ins, cash-outs, and time at machines electronically. You can request a win/loss statement at tax time — this is strong corroborating documentation.
3
Save ATM receipts at gambling locations
Keep the physical receipts or take photos. Match them to your diary entries for the same date.
4
Download online platform records
For DraftKings, FanDuel, BetMGM, and other online platforms, download your full account history at year-end. Most platforms provide transaction history and win/loss summaries.
5
Reconcile with your bank statement
At year-end, go through your bank statement and mark every gambling-related transaction. This reconciliation — diary + platform records + bank statement — creates a defensible audit trail.
Frequently asked questions
Are bank statements proof of gambling losses for taxes?
Bank statements are supporting evidence, not primary proof. The IRS requires a contemporaneous gambling diary or log as the primary record. Bank statements — showing ATM withdrawals at casinos, deposits from gambling platforms, or wire transfers — corroborate the diary but don't replace it. Courts have consistently held that bank statements alone are insufficient without a supporting log.
What does the IRS actually require to deduct gambling losses?
The IRS requires you to keep a gambling diary that records: date and type of gambling activity, name and address of the casino or gambling establishment, the amount won or lost, and names of any other people present. Supporting documents can include casino win/loss statements, ATM receipts, credit card statements, bank records, and Form W-2G (for reported winnings over thresholds). You can only deduct losses up to the amount of your reported winnings.
Can I deduct gambling losses if I have ATM receipts from a casino?
ATM receipts from a casino show you withdrew cash there, but don't prove you lost that money gambling. They're useful supplementary evidence alongside a gambling diary — but alone they don't establish a deductible loss. An IRS auditor or Tax Court judge will want to see a diary that reconciles the withdrawals against specific sessions.
How do I document online gambling losses?
For online gambling, your best documentation is: account history downloaded from the gambling platform (sessions, bets, wins, losses), bank statements or PayPal records showing deposits to and withdrawals from the gambling account, and a personal log reconciling the two. Online platforms often generate annual win/loss statements — request one at year-end.
What if I didn't keep records during the year?
You can reconstruct records after the fact using bank statements, credit card records, casino player's card history, and memory — but reconstructed records face more scrutiny in an audit. Casino player loyalty programs often have detailed transaction histories you can request. The stronger and more contemporaneous your documentation, the better your position if audited.
Do gambling winnings and losses offset each other on my tax return?
Not directly. Gambling winnings are reported as income on Schedule 1 (Additional Income). Gambling losses are deducted as an itemized deduction on Schedule A — meaning you must itemize rather than take the standard deduction. You can only deduct losses up to the total amount of your reported winnings for the year. You cannot carry forward excess losses to future years.
Does the IRS get notified of my gambling winnings?
Yes — casinos and gambling platforms are required to issue Form W-2G for slot or bingo winnings over $1,200, keno winnings over $1,500, poker tournament winnings over $5,000, and most other winnings over $600 at odds of 300:1 or greater. These forms are sent to both you and the IRS. Online gambling platforms increasingly report as well.
Disclaimer: This article is for general educational purposes only. It does not constitute tax or legal advice. IRS rules, thresholds, and requirements change. Consult a licensed CPA or tax professional before claiming any deduction.
