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Calculators

Special Assessment Calculator

Calculate your unit's share of a special assessment — equal split or by square footage

A special assessment is a one-time charge levied by an HOA or condo association to cover an unexpected expense or a project the operating budget can't absorb — a new roof, structural repairs, hurricane damage repairs, or a funding shortfall identified by a reserve study. Unlike monthly assessments, special assessments are authorized by a board resolution and typically require notice to unit owners under your governing documents and applicable state statutes.

How much each owner owes depends on how your declaration defines the allocation method. Most associations use an equal per-unit split — every unit pays the same dollar amount regardless of size or ownership percentage. Associations with units of significantly different sizes sometimes allocate by square footage, so larger units pay proportionally more. Some declarations allocate by percentage of interest, which may track square footage or may not — check your declaration's exhibit before calculating.

This calculator handles the two most common methods: equal per unit and by square footage. Enter the total project cost, your unit count, and for the square footage method, your unit's area and the total building area. The calculator shows your per-unit share and breaks it down into common payment plan installments. Payment plans are not guaranteed — they depend on what your board authorizes and what your governing documents allow.

Assessment inputs

Split method

Your assessment

$3,000

Equal share — 80 units × $3,000 = $240,000

Total project

$240,000

Payment plan options

PlanPaymentTotal owed
Lump sum$3,000$3,000
3 months$1,000/mo$3,000
6 months$500/mo$3,000
12 months$250/mo$3,000
24 months$125/mo$3,000

Payment plan availability is determined by your board and governing documents. Installment amounts shown are principal only — no interest included.

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This is an estimate. Actual assessment amounts and allocation methods are governed by your association’s declaration, bylaws, and the board resolution authorizing the assessment. Consult your association manager or attorney for the official amount owed.

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Frequently asked questions

What is a special assessment?
A special assessment is a one-time charge authorized by the board of directors to cover expenses that exceed the operating budget or reserves. Common triggers include major repairs (roof replacement, structural remediation, hurricane damage), emergency expenditures, and reserve fund deficits. Unlike monthly maintenance fees, special assessments are typically collected over a defined period and require proper notice to unit owners.
Can my association charge a special assessment without a vote?
In most states, the board has authority to levy special assessments up to a certain dollar threshold without a member vote. Above that threshold — often defined in the bylaws as a percentage of the annual budget or a fixed dollar amount per unit — member approval is required. Florida's condominium statute (F.S. § 718.112) sets specific limits on board-authorized assessments and notice requirements. Check your state statutes and governing documents for the exact rules that apply to your association.
How does the square footage allocation work?
Under the square footage method, each unit's share is calculated as that unit's square footage divided by the total square footage of all units, multiplied by the total assessment amount. A 1,200 sq ft unit in a building with 96,000 sq ft total pays 1.25% of the assessment. This method is most common in associations where units vary significantly in size and the governing documents define ownership interest by area.
Can owners pay a special assessment in installments?
Only if the board authorizes a payment plan. Boards may offer installment plans to reduce financial hardship, but there is generally no legal right to pay in installments unless your governing documents require it. Unpaid special assessments are treated like unpaid maintenance fees and can result in late fees, liens, and collection proceedings. If you can't pay a large assessment, contact your board or management company immediately to discuss options.