Condos are among the best short-term rental property types for bonus depreciation, and most buyers underestimate the Year-1 math because the unit-level details differ from a single-family home. Three factors stack in a condo's favor: (1) the individual land ratio is very low — typically 0% to 10% — because the land under the building is HOA-owned, so almost all of the purchase price becomes depreciable basis; (2) STR condos are almost always rented furnished, which means the unit interior is heavy on 5-year personal property (appliances, FF&E, finish flooring, decorative lighting); and (3) a pro-rated share of HOA common-area improvements (pool, hot tub, pergolas, outdoor kitchen, landscaping) is a legitimate 15-year land improvement on the owner's depreciation schedule. The real complexity in a condo cost seg isn't whether to do it — it's how the HOA common-area pro-rata share analysis is done, which is where generic calculators and some firms underperform. This guide covers the three favorable factors, how the pro-rata analysis works, which firms handle condos well, and how to screen a specific condo before you write the offer. For how condos stack up against cabins and luxury homes on the same budget, see our cabin vs. condo vs. luxury comparison.
TL;DR — condos are among the best STR property types for bonus depreciation (2026)
• Why condos stack up well: very low land ratio (land is HOA-owned, not yours) + furnished rental = heavy 5-year personal property + pro-rated HOA common-area 15-year land improvements. Three favorable factors stacked.
• Land ratio on a condo: typically 0–10% — vs. 20–30% for a single-family home. More depreciable basis per purchase dollar.
• Unit interior: appliances, finish flooring, cabinetry, decorative lighting, FF&E captured as 5-year personal property, 100% bonus-eligible.
• HOA common areas: pro-rated share of pool, hot tub, outdoor kitchen, pergolas, landscaping captured as 15-year land improvements, 100% bonus-eligible. This is the main complexity — the pro-rata share analysis is what separates well-done condo cost seg from generic single-family treatment.
• Firms that handle condo pro-rata well: R.E. Cost Seg, FreeCostSeg, Cost Seg EZ for sub-$1.5M residential; CSSI and KBKG for larger projects via custom quotes — see our cost segregation firms roundup.
• Pre-purchase screen: DepreciMax — $99, condo-aware land-ratio handling, runs before you offer.
How we evaluated condo cost seg tools and firms
For each tool and firm below we reviewed vendor public materials, confirmed whether they explicitly handle condos (vs. only single-family residential), and categorized by HOA common-area allocation approach, delivery time, and pricing. The HOA common-area treatment is the make-or-break detail for condos — a firm or tool that treats a condo like a single-family home will typically miss 15 to 25 percent of the available deduction. DepreciMax is the publisher of this article.
Why condos are excellent for STR bonus depreciation
Three factors stack in a short-term rental condo's favor — and the combination is actually stronger than most single-family vacation homes on the same budget.
1. The land is not yours (which is a feature, not a bug). Your condo deed is to the unit's airspace plus an undivided fractional interest in the HOA common elements. The dirt under the building is owned by the HOA. This means the IRS-recognized land-ratio allocation for your unit is typically 0 to 10 percent — much lower than what applies to a single-family property, where land can account for 20 to 30 percent of purchase price depending on market. Lower land ratio means more depreciable basis per purchase dollar, which means more Year-1 bonus depreciation when the cost seg study runs. On a $500K condo this is roughly $75K–$100K of extra depreciable basis vs. a single-family at the same price.
2. STR condos are almost always furnished — the entire interior is 5-year-heavy. Short-term rental condos get listed with appliances, FF&E (beds, sofas, TVs, Sonos, decor), finish flooring, custom cabinetry, decorative lighting, window treatments — all of which qualify as 5-year personal property, 100% bonus-eligible. Resort and beach condos also tend to carry nicer finishes than mid-market single-family rentals (quartz counters, custom tile, Lutron lighting, premium appliances) because the HOA aesthetic standards and rental competition push upgrades. On a typical furnished STR condo, the unit-interior 5-year allocation runs 15 to 25 percent of purchase price before you even touch the HOA common areas.
3. HOA common-area improvements add a 15-year bucket most buyers miss. If your HOA owns a pool, hot tub, pergola, outdoor kitchen, landscaping, retaining walls, outdoor lighting, decorative fencing, or other land-improvement assets, your deeded ownership percentage of those improvements is a legitimate 15-year land improvement on your personal depreciation schedule. For a well-amenitied condo complex (common at beach and resort properties), this allocation is often the biggest single addition in the Year-1 math — and it's the piece generic calculators and some firms miss entirely.
Where the complexity lives: the HOA pro-rata share analysis
Condos are structurally excellent for bonus depreciation. The complexity isn't whether to run cost seg — it's getting the HOA common-area pro-rata share right. Four things determine how well a cost seg firm handles this:
1. Does the firm actually scope HOA common areas? Not all do. Some firms treat a condo like a single-family unit, run the cost seg on the unit interior only, and skip the HOA 15-year allocation entirely. That's not wrong (it won't trigger IRS problems), but it under-counts the deduction by 5 to 15 percent of purchase price depending on amenity density. Residential-focused firms (R.E. Cost Seg, FreeCostSeg, CSSI) typically scope the HOA common-area allocation; some generic single-family-focused firms don't.
2. What documentation does the firm need? Properly scoping the HOA allocation requires three documents: the condo declaration (defines what common elements the HOA owns), the current bylaws (confirms your undivided ownership interest percentage), and the HOA's most recent audited financial statements or capital improvement schedule (establishes original cost basis for the common-area improvements). A firm that doesn't ask for these at intake is skipping the allocation. If your HOA is small and the documents are thin, you may need to source cost estimates from the HOA treasurer.
3. What pro-rata method does the firm apply? The pro-ration percentage comes from your condo's declaration, not a universal rule. Common methods: (a) equal shares (each unit = 1 / total units), (b) weighted by unit square footage, (c) weighted by assessed value, (d) weighted by purchase price. A 50-unit complex using equal-share pro-ration gives each unit a 2% share of HOA common-area improvements. A beach complex weighted by unit size might give a penthouse 4% and a studio 1%. Read your declaration.
4. How does the firm value the common-area improvements? Three sources, in descending order of defensibility: (a) HOA audited financials with original cost basis per improvement, (b) HOA current replacement reserve study (common in large complexes), (c) construction-cost estimation by the engineering firm based on what the improvements look like today. A good firm uses (a) when available and (c) as a fallback. A thin cost seg study that skips valuation entirely isn't allocating the HOA bucket at all.
On HOA pro-ration percentages. The specific pro-ration method and percentage is set by your HOA's declaration. For a typical 50-unit complex it's often around 2 percent per unit, but it varies widely — always read your own declaration before assuming a figure, and ask your cost seg firm which method they'll apply to your unit.
What qualifies as an HOA common-area 15-year land improvement
IRS Publication 946, Table B-1 classifies land improvements as 15-year property. For a condo owner, the undivided fractional interest in HOA-owned land improvements qualifies for the same classification — pro-rated by the method and percentage in your condo declaration. Common examples at a well-amenitied STR condo complex:
- Pool and pool deck (including heaters, pumps, lighting)
- Hot tub, spa, sauna
- Outdoor kitchen, grill area, pergolas, gazebos
- Landscaping, irrigation, retaining walls, decorative fencing
- Outdoor lighting, decorative pathways, outdoor fire pits
- Playground equipment, pickleball courts, tennis courts
- Decks, patios, balconies classified as common elements
These are the line items where generic calculators and single-family-focused firms underperform — they either skip the HOA bucket entirely or apply a thin estimate instead of pro-rating from HOA financial records. The dollar impact is real: on a well-amenitied beach complex, the HOA common-area 15-year bucket can be 5 to 12 percent of purchase price — $25K to $60K of Year-1 bonus deduction on a $500K condo.
What a condo cost seg study typically reclassifies
A representative Year-1 breakdown on a $500,000 beach condo at an amenitied complex, assuming the owner is renting furnished through Airbnb:
| Component | Classification | Approx. share of basis | Approx. Year-1 bonus deduction |
|---|---|---|---|
| Land | Not depreciable | 0–10% | $0 |
| Unit interior 5-year personal property (appliances, FF&E, flooring, cabinetry, decorative lighting) | 5-year, 100% bonus | 18–25% | $90,000–$125,000 |
| HOA common-area 15-year land improvements (pool, hot tub, pergolas, landscaping, outdoor kitchen) — pro-rated share | 15-year, 100% bonus | 5–12% | $25,000–$60,000 |
| Unit interior 39-year structural (framing, drywall, HVAC rough-in, embedded tile) | 39-year, not bonus | 60–72% | ~$8,000 (first-year MACRS) |
| Total Year-1 write-off | $125,000–$195,000 |
Illustrative only. Actual breakdown depends on the specific HOA amenity package, unit furnishing level, land-ratio allocation on the county assessor record, and the cost seg firm's classification judgment on borderline items. Always confirm with a licensed CPA before filing.
Firms that handle condos well
| Firm / Tool | Timing | Condo experience | HOA common-area allocation | Price band |
|---|---|---|---|---|
| DepreciMax | Pre-purchase | Yes — condo-aware land-ratio handling | Estimates full reclassification including HOA share from listing data | $99/property |
| R.E. Cost Seg | Post-purchase | Yes — residential-focused, condos covered | Yes, with HOA documentation | $950+ Rapid Report; $2,320+ Fully Engineered |
| FreeCostSeg (Modern CFO) | Post-purchase | Yes — SFR / STR / small-multifamily including condos | Yes, with HOA documentation | $1,200–$5,000 flat (most residential $1,200–$1,600) |
| Cost Seg EZ | Post-purchase | STR / residential supported | Partial — verify at intake | ~$895 Engineer-Reviewed; from ~$2,500 Fully Engineered |
| CSSI | Post-purchase | Yes — high-volume residential across all property types | Yes, custom scoped | Custom quote (not published) |
| KBKG | Post-purchase | Yes — particularly for larger condo projects / portfolios | Yes, custom scoped; KBKG also publishes a "condo tax basis allocation" specialty product | Custom quote (not published); typically fits properties above $1.5M depreciable basis |
For the full landscape of cost segregation firms — including ETS, Capstan, Madison SPECS — see our cost segregation firms roundup. For the full list of software and app-tier tools, see best cost segregation apps for Airbnb hosts.
Screen the condo before you write the offer
Pre-purchase screening before you buy the condo
Every one of the firms above runs after close. The $900 to $5,000 engineer-signed study happens once you own the condo, not before. For a buyer evaluating three or four candidate condos across two markets, that leaves the pre-offer decision running on vibes — or on a generic calculator that gets the condo land ratio wrong.
DepreciMax solves the pre-offer step. Paste a condo address, upload or link the Airbnb / Realtor listing photos, and the tool returns a Year-1 bonus depreciation estimate specific to that unit — using Claude Opus analysis of the actual photos (what's actually in the unit's interior) plus the county assessor record (which gives the condo-appropriate typically very low land ratio). For $99 per condo, a buyer can run all four candidates and pick the one with the strongest Year-1 math before writing a single offer.
DepreciMax vs. the free pre-purchase calculators — for condos specifically
Condos are the property type where generic calculators underperform the most. The free pre-purchase calculators from Cost Seg EZ, Cost Segregation Guys, and FreeCostSeg all apply a regional-average land ratio to the purchase price, which for a condo is typically 5 to 10x too high. The resulting deduction estimate is understated by $25,000 to $55,000 of Year-1 bonus depreciation on a $500,000 condo.
| Pre-purchase tool | Condo-specific land-ratio handling | HOA common-area awareness | Price |
|---|---|---|---|
| DepreciMax | Yes — pulls the actual county assessor land ratio for the condo unit (typically 0–10%) | Partial — estimates from unit listing data; full HOA pro-ration lands in the formal post-close study | $99 / property |
| Cost Seg EZ Free Estimate | No — applies regional average land ratio from typed zip input | No | Free (lead-gen) |
| Cost Segregation Guys Free Proposal | No — rep-reviewed general-stats | No | Free (lead-gen) |
| FreeCostSeg Free Calculator | No — applies regional average land ratio from typed inputs | No | Free (lead-gen) |
Screen your condo before you write the offer — $99
Paste any US condo address. Get a Year-1 bonus depreciation estimate with condo-aware land-ratio handling — in under 10 minutes. Then engage one of the firms above after you close for the engineer-signed study.
Run a Property Report — $99 →Frequently Asked Questions
Does cost segregation work on a condo short-term rental?
Yes. Cost segregation on a condo reclassifies the unit's interior personal property (appliances, finish flooring, cabinetry, decorative lighting, FF&E) into 5-year property and the pro-rated share of HOA common-area land improvements (pool, hot tub, pergolas, outdoor kitchen, landscaping) into 15-year property — both 100% bonus-eligible under the current IRC §168(k) regime. The land ratio on a condo is typically typically very low (0–10%) because the land is HOA-owned, which is actually favorable for the depreciable basis.
What is the land ratio on a condo?
A condo's individual-unit land ratio is typically 0 to 10 percent because the land underneath the building is owned by the HOA, not the unit owner. The owner's deed is to the unit airspace plus an undivided fractional interest in HOA common elements. This typically very low land ratio means almost all of the purchase price becomes depreciable basis — the opposite of a single-family home where land often eats 20 to 30 percent.
Can I depreciate HOA common areas as a condo owner?
Yes, pro-rated by your HOA ownership interest percentage. The pool, hot tub, pergolas, outdoor kitchen, landscaping, retaining walls, outdoor lighting, and other 15-year land improvements in the HOA common areas can be allocated to your unit based on your deeded ownership percentage. A properly scoped cost segregation study will capture this allocation; a free calculator typically will not.
Are high-rise condos different from townhouse-style condos for cost segregation?
The depreciable-asset classification rules are the same, but the specific common-area improvements differ. High-rise condos may include pro-rated share of lobby finishes, elevators (building system), pool and spa deck, fitness center FF&E. Townhouse-style condos more commonly include pro-rated share of outdoor amenities (pool, hot tub, pergolas) and landscaping. The cost seg study should enumerate the specific HOA common-area improvements in each case.
Should I get a cost segregation study on a $300,000 condo?
It depends on your Year-1 tax savings math. A $300,000 condo with typically very low individual land ratio produces roughly $280,000 of depreciable basis. If a cost segregation study reclassifies 25 to 35 percent of that into 5-year and 15-year property, Year-1 bonus depreciation lands in the $70,000 to $100,000 range. At a 37 percent marginal rate, that's $26,000 to $37,000 in Year-1 tax savings — more than enough to justify a $900 to $2,500 engineer-signed study.
Does HOA documentation matter for the cost segregation study?
Yes, meaningfully. Your HOA declaration, bylaws, and most recent audited financial statements document the specific common-area improvements the HOA owns and your undivided ownership interest percentage. A cost segregation firm will typically request these documents to properly allocate the HOA common-area 15-year assets. If your HOA is small or informal, the documentation lift may fall to you.
Can DepreciMax screen a condo before I buy it?
Yes. DepreciMax runs on any US property address, including condos. The $99 pre-purchase report analyzes the listing photos of the unit interior, applies a condo-appropriate typically very low land ratio from the county assessor data, and returns a Year-1 bonus depreciation estimate. The report flags whether the property is a condo so the land-ratio treatment reflects the HOA ownership structure correctly.
Is cost segregation on a condo worth it if the HOA fees are high?
HOA fees do not affect the cost segregation deduction directly — they are an operating expense deductible against rental income, not a depreciation input. What matters for cost seg is the purchase price, the land ratio (typically very low for condos (0–10%)), and the pro-rated share of HOA common-area 15-year improvements. High HOA fees often correlate with substantial amenities (pool, hot tub, spa, pergola, outdoor kitchen) which actually increase the 15-year reclassification.
Sources & further reading
Firm and tool facts in this article were sourced from each vendor's public materials as of the publish date at the top of the page. Verify any pricing or feature claim before signing an engagement. HOA common-area pro-ration percentages are set by each HOA's declaration — always read your own declaration before assuming a figure.
- IRS Publication 946 — How to Depreciate Property (Table B-1, land improvement 15-year class): irs.gov/publications/p946
- IRS — Cost Segregation Audit Techniques Guide: irs.gov cost segregation ATG
- DepreciMax: deprecimax.com
- R.E. Cost Seg: recostseg.com
- FreeCostSeg: freecostseg.com
- Cost Seg EZ: costsegez.com
- CSSI: costsegregationservices.com
- KBKG (including Condo Tax Basis Allocation specialty product): kbkg.com/cost-segregation
Firm and tool names, pricing, and feature descriptions were current as of the publish date and were sourced from each vendor's public website. Nothing in this article is tax, legal, or engagement advice — confirm your situation with a licensed CPA before filing.