Shared Expense Settlement Workbench

How to use Shared Expense Settlement Workbench

Each expense uses weighted largest-remainder allocation in participant order. Paid amounts minus allocated shares form net balances. A deterministic debtor-to-creditor pass clears those balances and verifies that every minor unit is accounted for.

1. Enter people json, expense json (paidby, minorunits, shares).
2. Choose the stated convention and check the units and supported model.
3. Calculate, inspect the result, then copy or download it.

Good to know

• Exact-grid inputs are plain decimals with at most six places and magnitude≤1e9. Raw JSON number spelling is checked before conversion; decimal strings can preserve exact grid values. Exact rational intermediates are bounded to 8192 bits. One user-declared currency and minor-unit scale only; enter integer minorUnits, not decimal major units. Up to 40 people and 100 nonnegative expenses of at most 1000000000 minor units each. No refunds, exchange rates, bank transfers, debt collection or minimum-transfer-count guarantee. Zero expenses are allowed; positive total share weight is required.
• Local calculation only; no input persistence or external lookup. Text/JSON is limited to 30000 characters and output to 1000000 characters. Numeric model inputs and precision/work limits are stated on this page. Approximate JSON numbers retain full stored values; exact arithmetic outputs retain decimal or fraction strings. Unsupported states fail explicitly.
• Educational user-assumption arithmetic only. No live prices, laws, tax rules, quotes or financial advice.