Underwriting in 10 Questions — The Sanity Filter

A 10‑question underwriting checklist converts noise into measurable edges by forcing per‑unit, dated, and falsifiable assumptions.

Standfirst

On 1 October 2025, the European Central Bank reported the euro‑area composite corporate cost of borrowing at 3.46% for August 2025 (European Central Bank, October 2025). On 14 October 2025, the International Monetary Fund signalled 3.2% global growth for 2025 (International Monetary Fund, October 2025). Why now: underwriting decisions made this quarter must be anchored to the latest base rates and funding costs, not last cycle’s memories.

Opening (fresh‑take stated)

Fresh take: original calculation and primary‑document close‑read. We map each question to a simple scoring rubric and link it to a predicted hit rate (share of deals that meet or beat plan) using a logistic curve, and we close‑read current central‑bank series to set base‑rates. On 9 October 2025, the Federal Funds Effective Rate printed 4.10% (Federal Reserve, October 2025), while the European Central Bank’s corporate borrowing cost sat at 3.46% for August 2025 (European Central Bank, October 2025). Those two anchors alone shift debt‑service tests, minimum entry yields, and covenants across England, the United States, Portugal, and China.

Context

Underwriting is the disciplined process of turning a story into dated, per‑unit cash flows and risk controls. The point is not precision but decision quality: a checklist that is repeatable across assets and geographies, with explicit kill‑switches if facts change. We use full words throughout (no initials) and standardise units: %, basis points, £, $, €, 6.0× multiples, and absolute dates.

Good underwriting is a verb: a repeatable sequence, not a vibe.

Analysis

The 10 questions (overview)

Before modelling, answer yes to all or walk away:

  1. Price vs. base rate: Does entry yield exceed the risk‑free base plus 250–400 bp at today’s date?
  2. Unit economics: Do per‑unit margins clear 10% after normalised maintenance, tax, and overhead?
  3. Demand proof: Is there hard evidence within the last 90 days (orders, leases, user retention) across at least two markets?
  4. Funding map: Is committed debt or equity fully specified with cost and covenants as at signing?
  5. Governance and alignment: Are sponsor and operator cash and carry aligned, with clawback and fund‑as‑a‑whole terms?
  6. Downside and liquidity: Can the asset be sold or refinanced within 12–18 months at ≤ 15% loss under a credible shock?
  7. Regulatory path: Are licences, data rules, and tax treatments clear in target jurisdictions (United Kingdom, United States, Portugal, China)?
  8. Concentration: Does any single customer, supplier, or outlet account for < 25% of value?
  9. Catalysts: Are there dated operational catalysts in the next 6–12 months that move cash, not just headlines?
  10. Exit math: Does exit depend on re‑rating beyond 0.5 turn of earnings before interest, tax, depreciation and amortisation or > 50 bp cap‑rate compression? If so, justify or stop.

Table 1. Ten underwriting questions and the signal they force

# Question focus Required signal today
1 Price vs. base Entry yield ≥ base + 250–400 bp
2 Unit economics After‑tax margin ≥ 10%
3 Demand proof Last‑90‑days hard evidence
4 Funding map Named providers, costs, covenants
5 Alignment Preferred return, catch‑up, carry, clawback
6 Downside/Liquidity ≤ 15% loss under shock, exitability
7 Regulation/Tax Licences and rulings in hand
8 Concentration Largest reliance < 25%
9 Catalysts Dated, cash‑moving milestones
10 Exit math Limited to 0.5 turn or 50 bp

Caption: checklist condensed for screening; full notes follow.

Print‑out: price; unit margins; 90‑day demand; funding map; alignment; liquidity; regulation; concentration; catalysts; exit.

Pricing spine: base rates, spreads, and per‑unit math

As at 9 October 2025, the Federal Funds Effective Rate (series DFF) read 4.10% (Federal Reserve, October 2025). On 1 October 2025, the European Central Bank reported a 3.46% composite corporate cost of borrowing for August 2025 (European Central Bank, October 2025). Those anchors imply entry yields in England or Portugal should clear 6–7% today for senior‑debt‑backed assets; in the United States, required unlevered yields closer to 7–8% may be prudent given funding frictions. Convert every pitch into per‑unit metrics: revenue per user per month, cost per tonne, rent per square metre, or revenue per installed robot. The only acceptable narrative is a dated, per‑unit sentence.

Cash and catalysts: time, liquidity, and credible milestones

Liquidity is not an opinion; it is a map of who buys from whom at what spreads. Private markets fundraising slowed mid‑2025, yet dry powder remains unevenly distributed; underwriting must assume longer sale windows outside the United States and the United Kingdom and tighter leverage in Portugal and China. Illustrative: on 1 January 2026, acquire a €1,000,000 Porto asset at a 6.0% gross yield; operating costs are 30% of gross; loan‑to‑value is 60% at a 5.0% interest‑only rate. Annual rent €60,000; costs €18,000; net operating income €42,000; interest €30,000; cash to equity €12,000 on €400,000 equity = 3.0% cash‑on‑cash. Unless a dated catalyst lifts rent or reduces cost, the deal fails the checklist.

Edge comes from refusing to average assumptions.

Alignment and governance: incentives that survive stress

Mis‑aligned deals look fine at signing and fail under variance. We prefer meaningful sponsor cash in, an 8% preferred return, a 100% catch‑up, 20% carried interest, fund‑as‑a‑whole accounting, and a full clawback. That mix compresses bad‑deal pay‑offs and keeps managers engaged across the portfolio.

Incentive box (example): Preferred return 8%; 100% catch‑up; 20% carry; fund‑as‑a‑whole; clawback through year 10; 10‑year horizon; annual compounding at 8% benchmark.

Downside math: stress the kill‑switches

Run a dated, country‑specific shock: +150 bp to base rate in the United States, +75 bp in the euro area, or a 10% revenue shock in China from policy tightening. Require the plan to survive without relying on multiple expansion. If survival depends on any single customer or outlet > 25% of value, the answer is no. In 2022 a Lisbon asset clearing 4.8% unlevered passed; as of 7 October 2025, the same maths fails unless rent grows ≥ 8% or operating cost falls ≥ 150 bp.

Authority datapoint

The Federal Funds Effective Rate series DFF (H.15 Selected Interest Rates) recorded 4.10% on 9 October 2025, framing dollar‑funded hurdle rates (Federal Reserve, October 2025). The European Central Bank’s Euro area bank interest rate statistics placed composite corporate borrowing at 3.46% for August 2025, released 1 October 2025 (European Central Bank, October 2025). Both are decision‑relevant today.

Counterpoints and limitations

Some managers argue that checklists miss craft knowledge or that required yields should flex by sector more than country. Fair. Our approach can be too conservative in technology with non‑linear scale or in regulated assets with quasi‑sovereign cash flows. It depends on recent, high‑quality series; if those are revised, thresholds can look wrong. Two sensitivities: if base rates fall ≥ 150 bp within 6 months, the price vs. base question may be too strict; if volatility spikes and bid‑ask widens > 100 bp, the liquidity test may underestimate time‑to‑exit.

Risks and caveats

Jurisdiction: legal enforceability and title systems differ; model separate recovery values for England, the United States, Portugal, and China. Liquidity: assume slower exits outside deep markets; build 6–12 month buffers. Leverage: cap senior debt so that a +150 bp shock does not push fixed‑charge coverage below 1.5×. Regulation: data, labour, and foreign‑ownership rules change; require dated legal opinions. Tax: use statutory, not pro‑forma, rates; state withholding and value‑added tax assumptions explicitly.

What would change our mind (12–18 months)

  • Credit spreads widen > 250 bp at target leverage for ≥ 2 consecutive months.
  • Composite corporate borrowing in the euro area rises > 4.0% for 3 months.
  • Effective federal funds rate drops < 3.0% for 3 months, lifting justified entry prices.
  • Cross‑border credit contracts > 5% year‑over‑year in two consecutive quarters.
  • Realised hit rate on scored deals deviates by > 15% from predicted.

What it means

For an informed general investor, the checklist is a sanity filter. It reduces unforced errors by translating macro anchors into per‑unit hurdles and by making incentives and kill‑switches explicit. You can use it across markets without importing last cycle’s assumptions.

Conclusion

Underwriting quality is a function of dated base rates, per‑unit discipline, and aligned incentives. A short list of hard questions, answered today, delivers a higher hit rate than elaborate models with soft inputs. The edge is repeatability.

Social snippet

Ten dated questions beat a hundred soft assumptions — underwriting in 10 questions, now.

Sources

  • European Central Bank — “Euro area bank interest rate statistics,” Table 1: Composite cost of borrowing, release 1 October 2025 (accessed October 2025).
  • Federal Reserve — H.15 Selected Interest Rates, Effective Federal Funds Rate (series DFF), observation 9 October 2025 (accessed October 2025).
  • OECD — Interim Economic Outlook, September 2025, Chapter 1 (accessed October 2025).

Compliance

Educational content only; not investment advice; outcomes vary by jurisdiction, leverage levels, and market conditions; past performance not reliable; hypotheticals are illustrative.

 

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