Keep the original currency attached to the result
A win of 150 dollars and a win of 150 euros are not the same amount. Before combining sessions, keep both the number and its currency. A bare “150” in a spreadsheet or note becomes ambiguous as soon as you play in more than one currency.
Separate two questions: what happened in the currency of the game, and how you choose to express that result in a reporting currency. The first is a session record. The second requires an exchange rate and a date or other consistent rule.
Calculate locally before converting
Suppose a session has 500 EUR in total buy-ins and a 650 EUR cash-out. The original result is +150 EUR. Using an illustrative rate of 1 EUR = 1.10 USD gives a reported result of +165 USD.
| Amount | EUR | USD at 1.10 |
|---|---|---|
| Buy-ins | 500 | 550 |
| Cash-out | 650 | 715 |
| Result | +150 | +165 |
Applying the same rate to both sides gives 715 − 550 = 165. If you convert the buy-in at one rate and the cash-out at another, the difference includes currency effects. That may be useful for some purposes, but it is a different calculation.
Choose a conversion policy and keep it visible
Possible reporting conventions include a rate fixed for each session or a later valuation of the combined balance. Do not silently switch between them. Preserve the original amounts so a report can be checked even if the displayed currency changes.
Bankroll Manager supports a main currency and session currency conversion with a rate locked per session. This keeps the session's conversion basis distinct from a later market quote. Check the currency and recorded rate when reviewing an entry; do not treat the displayed conversion as a promise of the amount a bank would pay.
Distinguish playing results from currency movement
In the example, the playing result remains +150 EUR. If someone later values that amount at 1.08 USD per EUR, it is worth 162 USD under that different convention. The three-dollar difference is not a new poker loss.
Similarly, a balance in a foreign currency can change in reporting-currency value without a hand being played. Label what a total represents. A converted historical-results report and today's cash-conversion value need not match.
Include conversion fees only where they belong
A card provider, exchange service or poker site may use a rate different from a published reference quote and may charge a fee. If 550 USD leaves your account to fund a 500 EUR balance, preserve the actual transaction evidence rather than assuming a reference rate explains every cent.
For personal bookkeeping, keep fees distinguishable from session outcomes. If a fee already reduced the net amount received, subtracting it again double-counts the cost. A reporting conversion inside an app is also not a real exchange transaction.
Round at a defined step
Intermediate rounding can make totals disagree with a separately calculated grand total. Keep adequate rate precision, then round money at the display or settlement step appropriate to your records. Different currencies do not all use the same number of minor units.
For a manual spreadsheet, write down whether totals add rounded session results or round the sum of unrounded amounts. Small differences may come from that policy, but do not use rounding as an explanation for an unchecked large discrepancy.
A quick check before combining sessions
- Every original amount has a currency.
- Buy-ins and payouts use consistent units.
- The conversion policy and rate are retained.
- Fees and outside funding are separate from playing results.
- The original figures remain available in backups or exports.
These records describe your poker activity. They are not a substitute for any separate accounting or tax treatment you may need.