Cost Segregation for Marinas and Boat Storage
Why Marinas and Boat Storage Require a Property-Specific Review
Marinas often have multiple asset classes across land and water: docks, utility distribution, dry-stack systems, service buildings, fuel infrastructure, and customer amenities. Ownership and permanence are central facts, especially where improvements occupy leased waterfront or submerged land.
Cost segregation is an accounting and engineering analysis. It does not create new basis. It identifies portions of an existing depreciable basis that may qualify for recovery periods shorter than the building's general recovery period. Land is excluded, and the final treatment depends on the property's facts, placed-in-service date, and current tax law.
Components the Study Team Will Review
A study for this property type commonly evaluates the following cost groups:
- Floating dock systems and gangways
- Shore-power and utility pedestals
- Dry-stack racking and handling support
- Fuel-dispensing infrastructure
- Customer-area furnishings and decorative finishes
- Paving, fencing, lighting, and site drainage
This list is a starting point, not a classification result. Similar-looking assets can receive different treatment when their function, permanence, or relationship to the building differs.
The Records That Improve the Analysis
The most useful records include dock contracts, marina permits, equipment schedules, utility plans, waterfront leases, fuel-system scopes, and civil drawings. When original cost detail is incomplete, the study team may use accepted estimating methods, but actual invoices and drawings generally make the allocation easier to support.
One early scoping question is: Are dock, utility, and fuel-system costs owned by the operator, the landlord, or a public authority? Answering it helps separate the owner's depreciable basis from tenant, vendor, or public-authority property.
Acquisitions, New Construction, and Renovations
For a recent acquisition, the analysis starts with the purchase-price allocation and removes nondepreciable land. For new construction, detailed job costs can be traced to individual systems. For an older property, a look-back study may allow the owner and tax advisor to evaluate an accounting-method change using Form 3115 rather than amending multiple returns.
Renovations deserve a separate review. The owner may need to identify disposed components, new qualified improvement property, and costs that were repaired rather than capitalized. A cost segregation report should coordinate with the fixed-asset ledger so the tax return does not continue depreciating assets that no longer exist.
How to Decide Whether a Study Is Worthwhile
Start with depreciable basis, remaining holding period, current and expected taxable income, passive-activity limitations, state conformity, and the expected study fee. Accelerated depreciation changes timing; it does not make the underlying tax basis larger. A future sale can also create depreciation-recapture consequences.
A useful estimate should therefore show assumptions instead of promising a deduction. Use Stratum's cost segregation calculator for an initial range, then have a tax advisor test the result against the owner's complete return.
What an Engineering-Based Study Delivers
A complete report should describe the property, establish the depreciable basis analyzed, explain the methodology, classify assets, reconcile the results to source costs, and provide depreciation schedules that a tax preparer can use. The IRS Cost Segregation Audit Technique Guide and IRS Publication 946 are useful reference points for methodology and depreciation rules.
Stratum prepares the study. AE Tax Advisors handles the discovery call and can discuss how the study fits within a broader real estate tax plan. Your return preparer remains responsible for the final filing positions.
Discuss a Marinas and Boat Storage Study
Bring the purchase date, placed-in-service date, estimated land value, current depreciable basis, renovation history, and available plans to the first conversation. Book a discovery call with AE Tax Advisors to scope a Stratum cost segregation study.