Property Chain Risk Calculator
Estimate the probability that a property chain completes given its length, and the expected cost of the attempts it takes to get there.
💼 Are you a real estate agent or broker? Send this calculator to your buyers on your own branded listing page — every enquiry comes straight to your WhatsApp. Create free agent page →Every link in a chain is a transaction that can fail, and the probabilities multiply rather than average. A chain where each link independently has an 85% chance of holding is not 85% likely to complete — with four links it is barely better than a coin toss.
That is why cash buyers and chain-free buyers are worth real money to a seller, and why understanding the chain matters more than the offer price when comparing two buyers.
Why probabilities multiply
A chain completes only if every link holds, so the chance is the per-link probability raised to the number of links. The expected number of attempts before one succeeds is one divided by that probability, and each failed attempt costs you the survey, legal and lender fees again.
Worked example
Four links, each with an 85% chance of holding, gives 0.85 to the fourth power — about 52%. That means roughly 1.92 attempts on average, so nearly one failed attempt is expected, costing about 4,166, and the expected time to completion is around 9.6 months rather than five.
Chain-free is worth paying for
A single-link transaction at 85% completes far more often than a four-link one, and the expected cost and delay fall accordingly. When comparing two buyers, the difference in chain length is frequently worth more than several thousand on the price.
Turn a calculation into an enquiry
Buyers who run these numbers are ready to talk. Give every listing its own page with your photo, phone and WhatsApp on it — leads land straight on your phone.
Create your free property pageFrequently asked questions
What is a realistic per-link probability?
It varies by market and by how binding an agreement is locally. Where nothing binds until a late formal stage, per-link failure rates of ten to twenty percent are common; where a sale binds at acceptance, they are far lower.
How do I shorten a chain?
Sell first and rent, buy a chain-free property such as a new build or probate sale, or use bridging finance to break the dependency. Each has a cost, and this calculation is how you decide whether it is worth paying.
Should I prefer a lower offer from a chain-free buyer?
Frequently yes. A higher offer that collapses costs you fees, months and a weaker position on relisting. Compare the offers on expected value rather than headline price.