Direct answer
To estimate monthly HOA dues, add annual operating expenses, reserve contributions, and planned project funding, subtract non-assessment income, then divide by the number of billable units and by 12. Boards should adjust the formula when governing documents require different allocation methods.
Interactive calculator
Enter annual budget numbers to estimate a flat monthly assessment per unit. Nothing is stored or sent anywhere — the math runs in your browser.
- Annual assessment need
- $114,000
- Annual per unit
- $950
Assumes equal allocation across units. Check your declarations for percentage interests or weighted formulas before publishing dues.
Calculator structure
| Part | What to include |
|---|---|
| Annual operating expenses | Routine costs such as landscaping, utilities, insurance, management, repairs, software, legal, and accounting. |
| Reserve contribution | Annual funding for future capital repairs and reserve study recommendations. |
| Planned project funding | Known special work the board intends to fund through regular assessments. |
| Other income | Interest, rental income, amenity fees, or other revenue that reduces assessment needs. |
| Billable units | Homes, lots, condos, or allocation shares used by the governing documents. |
How to use it
Use the dues formula as a planning estimate
The common flat-assessment formula is: monthly dues per unit = (annual operating expenses + reserve contribution + planned project funding - other income) / billable units / 12.
- Use annual numbers before converting to monthly dues.
- Separate reserve funding from routine operating expenses.
- Keep special assessments separate unless the board intentionally folds a project into regular dues.
Check allocation rules before publishing dues
Some associations do not split dues evenly by unit. Condos, mixed-use communities, and communities with different lot classes may require percentage interests or custom allocation formulas.
Common questions
What is the basic formula for HOA dues?
A simple estimate is annual assessment need divided by billable units divided by 12. Annual assessment need usually includes operating expenses, reserve funding, and planned projects minus other income.
Should reserve contributions be included in monthly dues?
Most boards should plan reserve contributions as part of the annual funding need, but the exact amount should reflect the reserve study, governing documents, and board policy.
Turn this calculator into a live HOA workflow.
Collect dues online, support autopay, record offline payments, and give treasurers payment records that connect residents, units, charges, receipts, and settlement status.