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small business · ~30 min

Should I buy or lease this equipment? (small business)

Last verified: 2026-09-08Lumina seed `buy-vs-lease-equipment-decision`

Not tax, accounting, or legal advice. No invented APR or Section 179 outcomes. You own the capex call.

Top picks

Best Overall

Claude

Holds labeled paths and paste-only rules without inventing numbers.

Open Claude

Best Free

ChatGPT Free

Fast scorecard + path labels from one pack.

Open ChatGPT

Best Power-User

Claude + second pass in ChatGPT

Tree in one; invented-fact / tone check in the other. Gemini is also solid. You own the call—AI only structures options.

Open Claude

Protocol

  1. Paste facts (5–8 min).

    Assemble only what you actually know. Mark gaps [MISSING] / [NEED FACT]. Do not invent rates, BATNA, legal outcomes, or benchmarks. This small-business purchase gate is not weekly-cash-position-brief (snapshot) and not lease-contract-clause-checklist (clause reading after you have a lease doc). Do not invent APR, residual values, or Section 179 outcomes.

    Paths at a glance

    PathLean this way when (from your paste)
    A — BuyUtilization high and sustained; cash or financing terms you pasted clear your hurdles; ownership fits horizon.
    B — Lease / financeCash preserved matters; you have real lease/finance quotes; term matches need horizon.
    C — Rent short-termNeed is temporary or utilization uncertain—rent quotes you have beat owning now.
    D — Defer / subcontractDemand unproven; subcontracting capability is available; wait for clearer utilization.
  2. Lock decision-tree rules (step 2).

    Paste the rules first so the model cannot mint APR, tax credits, Section 179 outcomes, or residual values.

    Copy-paste prompt

    Help me run a BUY vs LEASE equipment decision tree.
    Hard rules:
    - Use ONLY quotes, utilization, and cost facts I paste. Do not invent APR, tax credits, Section 179 outcomes, or residual values.
    - Mark tax topics [NEED ADVISOR] unless I pasted advisor numbers.
    - Paths: Path A Buy / Path B Lease/finance / Path C Rent short-term / Path D Defer/subcontract.
    - Not tax, accounting, or legal advice. I decide.
    Confirm in one sentence, then wait for my pack.
  3. Fill pack (step 3a) and generate (step 3b).

    Paste the pack, then send the generate command. The model must not pick a path for you.

    Paste pack

    EQUIPMENT / CAPABILITY NEEDED: [ ]
    PURCHASE PRICE QUOTE(S): [or MISSING]
    LEASE / FINANCE QUOTE(S) I HAVE (rate/term only if on the quote): [or NONE—do not invent APR]
    SHORT-TERM RENT OPTIONS: [or NONE]
    EXPECTED UTILIZATION (hours/jobs per period)—my estimate basis: [or MISSING]
    MAINTENANCE / INSURANCE / STORAGE COSTS I KNOW: [or MISSING]
    CASH / DEBT CAPACITY NOTES: [or MISSING]
    HORIZON (how long I need this capability): [ ]
    SUBCONTRACT ALTERNATIVE: [or NONE]
    TAX EFFECTS: [NEED ADVISOR unless advisor already gave numbers I paste]

    After you send the filled pack, copy the Generate command in the next box and paste it into the SAME chat so the AI runs the decision tree / produces the output.

    Generate command — copy and send this next (same chat)

    Build the decision tree now:
    1) Facts vs [MISSING]
    2) Scorecard table: Criterion | My fact | Lean (+/0/− or NEED FACT) | Note
    3) Path A Buy / Path B Lease-finance / Path C Rent short-term / Path D Defer or subcontract — for each: when it fits, what must be true from my pack, 3 owner-verify bullets
    4) Do NOT pick for me. Do not invent facts.
  4. Choose a path (step 4); optional wording.

    Only after you pick a labeled path. Owner-verify: facts still match your pack; [MISSING] gaps filled or accepted; any sendable wording uses only terms you authorize.

    Path wording

    I chose Path [A/B/C/D]. Draft an internal one-page decision note with Facts vs Assumptions vs Open questions from my pack only.
    No invented APR or tax savings. Mark [NEED ADVISOR] / [NEED FACT].
  5. Second-model check (step 5).

    In the other tool, paste the tree plus your pack:

    Second-model check

    Here is a buy-vs-lease tree from another assistant plus my pack.
    Find: (1) invented APR/residuals/tax savings, (2) utilization invented beyond my notes, (3) lease clause enforceability claims, (4) forced Buy or Lease.
    Return only corrections. Not tax advice.
  6. Human decide and act (step 6).

    Pick one path. Fill [NEED FACT] gaps from real sources. Send or implement yourself—AI drafts are not approvals, contracts, classifications, or tax elections. When reviewing a lease PDF later, use the lease clause checklist.

When not to

  • Not tax or accounting advice—do not treat chat as Section 179 guidance.
  • Do not invent APR or residual values missing from quotes.
  • Skip if you have no quotes or utilization basis—get those first.
  • When reviewing a lease PDF later, use lease-contract-clause-checklist.

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