Wealth screening vs predictive modelling: how to target donors with confidence
Strategy & Frameworks
Capacity tells you how much a donor could give; propensity tells you who is likely to act, and strong targeting uses both to decide the next step.
Most targeting debates stall because two tools get treated as one. Wealth screening and predictive response modelling both promise better lists, but they answer different questions. Confuse them and you either over-mail wealthy people who never respond or overlook loyal donors who would give again if asked.
This guide explains the difference in plain terms, then gives you a framework for deciding which donors get personal outreach, which get email and which come off the campaign entirely.
What is wealth screening?
Wealth screening estimates a donor's financial capacity. It appends external data such as property records, business affiliations, stock holdings and past philanthropic gifts to tell you how much someone could give.
The question it answers: how much is this person capable of giving?
What it does not tell you is whether that person will give to you, or when. Capacity is a ceiling, not a forecast.
What is predictive response modelling?
Predictive response modelling estimates propensity. It uses your own CRM data, giving history, recency, frequency, channel behaviour and engagement, to rank each donor by how likely they are to respond to a specific ask.
The question it answers: who is likely to act, and on what?
Propensity models return ranked lists and propensity scores you can use to set a cutoff. They replace static RFM segments and gut feel with a signal that reflects how each donor actually behaves.
Capacity vs propensity: the core distinction
Capacity and propensity are not competing tools. They sit on different axes. One measures potential size, the other measures likelihood of action.
Dimension | Wealth screening (capacity) | Predictive modelling (propensity) |
|---|---|---|
Question answered | How much could they give? | Who is likely to respond, and to what? |
Primary data source | External wealth and asset data | Your CRM and giving history |
Output | Capacity rating or estimated gift range | Ranked list and propensity scores |
Best used for | Sizing the ask and spotting major-gift potential | Prioritising contacts and setting a cutoff |
Main weakness | Says nothing about intent or timing | Does not estimate how large a gift could be |
Trade-off | High capacity can mislead if propensity is low | High propensity still needs an ask amount |
The takeaway: capacity helps you size the ask, propensity helps you decide whether to make it at all. You need both to act well, but they feed different steps.
Why using one without the other wastes budget
Run on capacity alone and you fill a major-gifts pipeline with wealthy prospects who have no relationship with your cause. Officers spend months on people who were never going to respond.
Run on propensity alone and you know who will act but not how much to ask for. You leave money on the table by sending a £50 appeal to someone who could comfortably give £5,000.
The cost of getting this wrong is concrete: wasted mail, donor fatigue from over-contact and staff time spent on the wrong names. Rising print and media costs make that waste harder to defend to leadership.
A framework for who gets what
Use propensity to decide whether to contact someone, and capacity to decide how. Score every donor on both, then sort them into three groups.
Group 1: personal outreach
High propensity and high capacity. These donors are likely to respond and able to give at scale. Assign them to a gift officer for a call or a personal visit. This is the smallest group and the highest return on staff time. Use the capacity rating to set the ask amount and the propensity score to prioritise the order of contact.
Group 2: email and direct mail
High propensity and moderate or lower capacity. These donors are likely to act but not at major-gift levels. Reach them efficiently through email and mail with a tailored ask ladder. This group carries the volume of your annual program. Let propensity set the cutoff so you mail fewer people with confidence rather than mailing the whole file to feel safe.
Group 3: exclude or suppress
Low propensity, regardless of capacity. A wealthy name with no likelihood of responding still costs money to contact and adds noise to your results. Suppress these records from the campaign. Excluding them is not giving up on the donor. It protects budget now and frees you to re-engage through stewardship or a different program later.
How to put the framework to work
Score your file on propensity using your CRM data, and rank donors from most to least likely to respond.
Append capacity ratings so you can size asks for the donors worth a personal approach.
Draw a propensity cutoff for the campaign, and route everyone above it into personal outreach or email based on capacity.
Suppress the low-propensity tail, and document the cutoff so the decision is easy to explain and approve.
Measure response and net revenue by group, then sharpen the next campaign.
Practical takeaways
Capacity and propensity answer different questions. Screening sizes the ask, modelling decides who to contact.
Lead targeting with propensity. It tells you who to contact and where to set the cutoff.
Layer capacity on top for the donors worth a call, so the ask matches what they can give.
Exclude low-propensity records even when capacity is high. A high capacity score is not a reason to mail.
Keep the cutoff documented so stakeholders can approve it quickly.
Conclusion
Wealth screening and predictive modelling are not rivals. They answer different questions, and strong targeting uses each for what it does best. Propensity decides who gets contacted and how hard you lean in. Capacity decides how much to ask for. Put them together and you get a short, ranked list your team can approve: who to call, who to email and who to leave off the campaign. That is fewer, better touches, and a targeting decision you can defend.
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