← Research lab95 · Four-roommate scenario model

Monthly settle karna transfers ko kitna reduce karta hai?

The model assumes one roommate pays each expense and the other three reimburse their shares. A monthly close keeps those obligations in the ledger and settles only the final net balances.

Scenario modelReviewed 16 October 2026
60→3

transfers at 20 expenses

A modelled 95% reduction.

1

monthly review

One checkpoint for corrections and refunds.

4

roommates

All costs are shared by all four in this model.

Results

Model ka output.

Monthly expensesPay each timeMonthly net closeReduction
5 expenses

15 transfers

≤3 transfers

≥80.0%

10 expenses

30 transfers

≤3 transfers

≥90.0%

20 expenses

60 transfers

≤3 transfers

≥95.0%

30 expenses

90 transfers

≤3 transfers

≥96.7%

Sample

Exactly kya analyse hua?

A four-person household with 5, 10, 20 or 30 fully shared expenses in one month.

Method
  1. 01

    Count three immediate repayments for every expense.

  2. 02

    Assume all expenses remain open until month end in the net case.

  3. 03

    Use three as the practical maximum final transfers for four non-zero balances.

  4. 04

    Compare payment instructions, not the rupee value transferred.

What we learned

Findings ko context mein padho.

  • The administrative benefit grows with expense frequency.
  • Monthly settlement requires enough trust and cash-flow capacity to carry a temporary balance.
  • Large one-off expenses can use an earlier threshold without abandoning the monthly system.
Quick answers

Study FAQs.

Is monthly settlement always better for roommates?

No. It works when the household trusts the ledger and balances remain affordable. Large purchases may still need faster reimbursement.

Why is the monthly result shown as at most three transfers?

A four-person net balance can usually be settled by matching debtors and creditors in no more than three practical transfers.