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Prorated HOA Dues Calculator

Split HOA dues fairly for a partial period.

How it is calculated

Proration here is a day-count split: prorated dues = monthly dues × days owned ÷ days in the period. The daily rate shown is monthly dues ÷ days in the period. You choose the denominator yourself (28, 29, 30 or 31, or 365 if you enter an annual fee), so the tool does not look at a calendar and does not know which month the closing falls in. The prorated amount is calculated from the exact daily rate and rounded to cents only at the end, so multiplying the displayed daily rate by the days can differ by a few cents. Amounts are in dollars. Days in the period must be above zero and days owned cannot be negative. A days-owned value above the period is not capped.

Worked example

Monthly HOA dues are $350 and a sale closes so that the buyer owns the home for 17 days of a 30-day month. Daily rate: 350 ÷ 30 = 11.6667, shown as $11.67. Prorated dues: 350 × 17 ÷ 30 = 5,950 ÷ 30 = 198.33, shown as $198.33. The seller's share is the remaining 13 days, 350 × 13 ÷ 30 = $151.67, and the two parts add back to the full $350.00. Multiplying the rounded $11.67 by 17 would give $198.39, six cents more.

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Common mistakes

  • Using the wrong number of days in the month: dividing by 30 for a 31-day month changes the daily rate and the whole split.
  • Counting the closing day for both parties or for neither: decide, as your contract does, whether day of closing belongs to the buyer or the seller before entering days owned.
  • Entering the annual fee with a 30-day month: for an annual fee use 365 as the period and the days owned in the year.
  • Multiplying the displayed daily rate by the days yourself: the tool uses the unrounded rate, so your hand total can be off by cents.
  • Assuming the same rule applies at every closing: some contracts and local customs use a 30-day month for all months, and special assessments may be handled separately from regular dues.

Sources

About this calculator

Prorated HOA dues come up whenever ownership of a property changes hands partway through a billing period — a home sale that closes on the 15th of the month means the outgoing owner shouldn't pay for the second half of the month and the incoming owner shouldn't pay for the first half. Proration splits the monthly (or sometimes annual) homeowners association fee based on the exact number of days each party actually owned the property.

Real estate closings routinely need this calculation to fairly credit and debit each party at settlement, and HOA-managed communities — condos, planned developments, co-ops — use the same logic for move-in and move-out dates. Split the association fee by ownership days: enter the full period's dues, the days in the period and the days you owned the home, and your prorated share is shown.

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  • Editorial team

    With 250 USD monthly dues and 10 days owned, a 31-day month gives 80.65 USD and a 30-day month gives 83.33 USD. The gap comes only from the divisor, so match it to the closing statement or the HOA payoff letter. Dues are often paid in advance, so the seller may be due a credit for the days after closing; this tool shows the share for the days you enter and does not decide who pays whom. How does your contract count the closing day?

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