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HOA Special Assessment Calculator

Calculate a fair, transparent per-unit special assessment for your next capital project. Compare equal split, square footage, and ownership percentage methods — with reserve offsets and payment plans built in.

Enter Your Project Details

Total Project Cost

Full cost of the capital project (roof, pool, elevator, etc.)

Number of Units

Total homes or lots in your community

Assessment Method

Quick answer

An equal-split special assessment divides the project cost by the number of units. A $200,000 roof replacement across 100 units is $2,000 per unit — or about $83/month spread over 24 months. Applying reserve funds first reduces what each owner owes. Per-unit assessments of $1,000 or more are flagged as a critical impact on owners.

Equal-split special assessment for a 100-unit community (no reserve offset)

Project cost	Per unit (lump sum)	Over 12 months	Over 24 months
$50,000	$500	$42/mo	$21/mo
$100,000	$1,000	$83/mo	$42/mo
$200,000	$2,000	$167/mo	$83/mo

Equal-split method, no reserve offset or financing interest. The calculator also supports square-footage and ownership-percentage splits, reserve offsets, and payment-plan interest.

This calculator provides estimates only. Always review your governing documents and consult with your HOA attorney before levying a special assessment. State laws and bylaws vary on notice requirements, voting thresholds, and maximum assessment amounts.

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Frequently Asked Questions

Last updated June 2026

What is a special assessment?: A one-time fee levied on homeowners to cover unexpected capital expenses or budget shortfalls not covered by reserves. Examples include roof replacement, elevator repair, pool resurfacing, or fence replacement. Unlike regular dues, special assessments are tied to specific projects and are not recurring.
How is a special assessment different from regular dues?: Regular dues are recurring monthly or annual payments that cover operating expenses like landscaping, insurance, and utilities. Special assessments are one-time charges for specific capital projects or emergencies that exceed the reserve fund balance. They require separate board action and often a community vote, depending on state law and governing documents.
Can a special assessment be financed or paid over time?: Yes. Many boards offer payment plans of 3, 6, 12, or 24 months to make the burden more manageable for homeowners. This calculator shows monthly payment options and can factor in a simple interest rate if the association charges financing fees. Always document the payment plan terms in writing.
What if some owners can't pay the special assessment?: Boards can offer payment plans, hardship exemptions, or in extreme cases, place liens on the property. Communication and flexibility are key. Most states allow liens for unpaid special assessments, but the board should exhaust all reasonable payment options before pursuing legal action. Consult your HOA attorney for state-specific procedures.
How do we vote on a special assessment?: Requirements vary by state and governing documents. Most states require at least a board vote; some require a majority or supermajority of homeowners. California's Davis-Stirling Act requires board approval with 30 days notice to homeowners for assessments exceeding 20% of the budget. Florida requires a majority of the total voting interests. Check your CC&Rs and state law before proceeding.
Can reserve funds be used to reduce a special assessment?: Yes, if reserves are available and the project qualifies under your reserve study. Using reserves reduces the per-unit burden but may deplete funds for future projects. The board must ensure the reserve fund remains adequately funded after the withdrawal. Some states require reserve funds to be used only for the purposes specified in the reserve study.

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Quick answer

Equal-split special assessment for a 100-unit community (no reserve offset)

Project cost	Per unit (lump sum)	Over 12 months	Over 24 months
$50,000	$500	$42/mo	$21/mo
$100,000	$1,000	$83/mo	$42/mo
$200,000	$2,000	$167/mo	$83/mo

Equal-split method, no reserve offset or financing interest. The calculator also supports square-footage and ownership-percentage splits, reserve offsets, and payment-plan interest.

Frequently Asked Questions

Last updated June 2026

What is a special assessment?

A one-time fee levied on homeowners to cover unexpected capital expenses or budget shortfalls not covered by reserves. Examples include roof replacement, elevator repair, pool resurfacing, or fence replacement. Unlike regular dues, special assessments are tied to specific projects and are not recurring.

How is a special assessment different from regular dues?

Regular dues are recurring monthly or annual payments that cover operating expenses like landscaping, insurance, and utilities. Special assessments are one-time charges for specific capital projects or emergencies that exceed the reserve fund balance. They require separate board action and often a community vote, depending on state law and governing documents.

Can a special assessment be financed or paid over time?

Yes. Many boards offer payment plans of 3, 6, 12, or 24 months to make the burden more manageable for homeowners. This calculator shows monthly payment options and can factor in a simple interest rate if the association charges financing fees. Always document the payment plan terms in writing.

What if some owners can't pay the special assessment?

Boards can offer payment plans, hardship exemptions, or in extreme cases, place liens on the property. Communication and flexibility are key. Most states allow liens for unpaid special assessments, but the board should exhaust all reasonable payment options before pursuing legal action. Consult your HOA attorney for state-specific procedures.

How do we vote on a special assessment?

Requirements vary by state and governing documents. Most states require at least a board vote; some require a majority or supermajority of homeowners. California's Davis-Stirling Act requires board approval with 30 days notice to homeowners for assessments exceeding 20% of the budget. Florida requires a majority of the total voting interests. Check your CC&Rs and state law before proceeding.

Can reserve funds be used to reduce a special assessment?

Yes, if reserves are available and the project qualifies under your reserve study. Using reserves reduces the per-unit burden but may deplete funds for future projects. The board must ensure the reserve fund remains adequately funded after the withdrawal. Some states require reserve funds to be used only for the purposes specified in the reserve study.