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A teaser, confidential information memorandum, indication of interest, and letter of intent are four distinct M&A documents that sit at different stages of a sale process and allocate different types of risk. The teaser markets without disclosing. The CIM discloses without committing. The IOI bids without binding. The LOI binds selectively, and that selective binding is where many finance professionals underestimate the document.
Understanding teaser vs. CIM vs. IOI vs. LOI is not an academic exercise. It directly affects valuation, deal certainty, financing plans, negotiating leverage, investment committee materials, and what later appears in the definitive agreement. For bankers, sponsors, lenders, and corporate development teams, clean sequencing produces better models, fewer diligence surprises, and more credible decision-making.
A controlled sell-side M&A process starts with outreach discipline. The banker prepares a buyer list and teaser before contacting potential bidders. Interested parties sign a non-disclosure agreement before receiving the CIM. Buyers then submit IOIs, also called first-round bids, non-binding indications, or expressions of interest.
The seller uses IOIs to narrow the field. Price matters, but so do structure, financing certainty, approval requirements, diligence demands, and the risk that a buyer is mining the process for competitive intelligence. Shortlisted buyers then receive broader data room access, management meetings, quality of earnings materials, tax workpapers, and draft transaction documents.
The LOI is the bridge between auction and execution. It determines exclusivity, diligence scope, purchase price mechanics, working capital principles, rollover expectations, financing conditions, and negotiating leverage for the definitive agreement. Treat it as ceremonial, and the economics can move before the model catches up.
| Document | Main Function | Key Finance Risk |
|---|---|---|
| Teaser | Generate interest while protecting identity | Leakage or inflated positioning |
| CIM | Support first-round valuation | Unsupported EBITDA adjustments |
| IOI | Compare preliminary bids | Headline value masking conditionality |
| LOI | Set terms before exclusivity | Binding process terms shifting leverage |
A teaser is a short, often anonymous marketing document designed to create interest while protecting confidentiality. A strong teaser answers four questions: what the business does, why it is attractive, how large it is, and why the recipient should sign an NDA.
The teaser should not prove the investment thesis. It should attract the right buyers and discourage the wrong ones. Typical content includes sector, end markets, geography, revenue, adjusted EBITDA, ownership background, transaction rationale, high-level growth drivers, and banker contact details.
The teaser should avoid customer names, supplier names, employee names, contract-level detail, pricing architecture, or any combination of facts that effectively reveals the target in a concentrated market. Two failure modes matter most. Leakage damages the process before diligence begins. Over-positioning damages credibility when teaser EBITDA fails to reconcile with the CIM.
The CIM is the core sell-side marketing document. Bankers usually draft it using management interviews, financial schedules, board materials, customer data, and projections. It gives buyers enough information to decide whether to spend time and money, without releasing every contract, tax file, employment agreement, or cyber incident report.
A complete CIM covers the executive summary, company history, ownership, management team, products, revenue model, end markets, competitive positioning, customer concentration, supplier profile, historical financials, management adjustments, forecasts, capital expenditure requirements, net working capital profile, and summary debt-like items.
The CIM is where adjusted EBITDA narratives are won or lost. Addbacks should be specific, quantified, and traceable. Run-rate synergies, owner normalization, and one-time costs are not self-validating. A sponsor or credit investor will ask whether each adjustment is cash, recurring, controllable, already achieved, and supportable by source documents.
The correct buyer posture toward a CIM is useful but unverified. Tie revenue to the general ledger, bank statements, tax returns, and contracts. Tie margin claims to product-level or customer-level data. Tie growth claims to pipeline conversion rates, capacity, pricing power, and churn.
An IOI is a non-binding written proposal submitted after reviewing the CIM and limited data room materials. It helps the seller compare valuation, structure, financing certainty, diligence requirements, and execution risk before granting broader access.
A decision-useful indication of interest should state enterprise value or equity value, whether the bid is a range or point estimate, whether valuation assumes cash-free, debt-free treatment, proposed structure, financing sources, required rollover equity, key diligence items, approvals, timing, and material conditions.
Sellers should not select IOIs based only on headline enterprise value. A higher bid with broad diligence outs, uncommitted debt, antitrust exposure, and vague working capital assumptions is often inferior to a lower bid with committed equity, limited conditionality, and clear purchase price mechanics. The bid you can close beats the bid you cannot.
Buyers should not hide known assumptions. If the bid assumes a tax step-up, debt-like treatment for deferred revenue, customer consents, or a specific working capital peg, say so. Silence preserves flexibility in the short run but destroys credibility when assumptions surface in diligence.
An LOI, also called a term sheet or heads of terms, sets proposed transaction terms before definitive documentation. Most LOIs make purchase price, structure, and the obligation to close non-binding, while making confidentiality, exclusivity, access, governing law, public announcements, employee non-solicitation, and sometimes break fees binding.
That split matters commercially. A buyer may have no obligation to close, but it can still breach exclusivity or misuse information. A seller may have no obligation to sell, but during exclusivity it usually cannot shop the company. That trade-off removes auction tension and shifts leverage toward the selected buyer.
A useful letter of intent addresses buyer, seller, acquired interests, purchase price, consideration mix, debt-like items, working capital methodology, tax structure, transaction expenses, management rollover, financing sources, confirmatory diligence, regulatory approvals, exclusivity period, binding provisions, expiration, and remedies.
A practical way to read teaser vs. CIM vs. IOI vs. LOI is to map each document to the model version it supports. The teaser supports a quick screen, not a credit paper. The CIM supports a first-round valuation case. The IOI records bid assumptions. The LOI should align the model with the economics the parties expect to document.
A junior banker or PE associate should keep an assumptions bridge from CIM to IOI to LOI. If CIM adjusted EBITDA is $25 million, the IOI values the business at 10.0x, and the LOI introduces a $4 million deferred revenue adjustment plus a higher working capital peg, the effective multiple has changed. The IC memo should show that movement clearly, rather than burying it in legal drafting comments.
Purchase price mechanics are the most common source of quiet retrades. The buyer should specify whether price assumes a cash-free, debt-free transaction and define indebtedness beyond bank debt. Relevant items can include capital leases, accrued bonuses, unpaid transaction expenses, deferred purchase price, tax liabilities, customer deposits, deferred revenue haircuts, and litigation liabilities.
Net working capital also needs early discipline. The IOI should state whether valuation assumes a normal level of working capital. The LOI should establish peg methodology, measurement date, accounting principles, sample calculation, and dispute process. Small changes can move equity value enough to change sponsor returns and management proceeds.
Earnouts and rollover equity belong in the LOI when they affect price or incentives. An earnout should cover metric, period, accounting method, audit rights, operating covenants, and tax treatment. Rollover equity should define issuer, security class, governance rights, transfer restrictions, and whether management participates pari passu with sponsor equity.
Information access should expand as buyers earn trust. The NDA gates CIM delivery and should cover confidentiality, permitted representatives, return or destruction of materials, no-contact rules, and remedies. Early data rooms contain selected financials, market materials, summary customer data, and management presentations. Later rounds add contracts, quality of earnings reports, HR files, tax materials, legal schedules, IT materials, environmental reports, and insurance policies.
Competitively sensitive information should not be uploaded casually. Pricing, customer-level margin, bid strategy, product roadmap, and employee compensation may require clean team access, redactions, or outside-counsel-only review. Information sharing is a deal management issue, not just a legal formality, because leaks can damage value and relationships.
Financing assumptions should tighten by the LOI stage. Private equity buyers may use the IOI to signal equity commitment and financing strategy without full debt commitments. Before granting exclusivity, sellers should require a clearer financing plan and pressure-test leverage, lender appetite, and approval timing.
Credit providers read the CIM as management advocacy, not verified fact. They will re-underwrite adjusted EBITDA, recurring revenue, customer concentration, collateral value, liquidity, and covenant headroom. If the LOI price assumes leverage lenders will not support, the buyer must write more equity, retrade, add seller paper, or walk.
Regulatory and tax issues should appear before exclusivity if they affect timing or value. Foreign investment review, sanctions, AML, export controls, data privacy, and government contracting rules can restrict access and closing certainty. Tax structure also matters early because asset purchases, stock purchases, elections, rollover deferral, withholding, VAT, and transfer taxes can change after-tax proceeds and buyer basis.
The teaser creates attention, the CIM creates a valuation basis, the IOI ranks buyers by credibility as much as price, and the LOI allocates process control before definitive documents exist. For finance professionals, the career-relevant skill is to connect each document to model assumptions, diligence priorities, financing certainty, and negotiation leverage before small drafting choices become expensive deal outcomes.
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