we've all heard it

"You spend 5x more replacing a donor than keeping one." If 4 out of 5 first-time donors never give again, remind me... why are we prioritizing acquisition?

you don't need more donors. you need donors who stay.

keep more of your donors

I've been a donor too. That's me, visiting my sponsored child in India—seeing firsthand what my giving made possible. That moment is what every supporter on your list deserves (even if they don't want to take the flight). - BB

Bonar Bell sitting next to a smiling child in a pink shirt and knee pads on a red concrete bench in Zambia.

Most of your donors have no idea what their gift made possible. That's why they won't give again.

fundraising resource

you're doing everything right, so why are your donors still leaving?

Most fundraisers are sending donor updates, closing the loop, following the frameworks, and still losing too many donors.

Find out exactly where your donor communications are breaking down, and what to do about it.

get your free copy

our services

keep the donors you've worked so hard to get

Cover of ChildFund New Zealand's 2020 Impact Report titled 'thrive' featuring a woman hugging a smiling child, alongside an open report page about COVID-19 response.

donor touchpoints →

Short term projects: A report, a campaign, a welcome series. One specific communication rebuilt around the donor results chain. Concrete, deliverable, and designed to show donors exactly what their gift made possible.

Perfect fit for: fundraising teams that need something done well, right now

Here's an example of an impact report I designed for ChildFund when I was their Director of Fundraising Impact and Optimization. - BB

are your donors on the road to loyalty?

digital donor experiences →

A website rebuild, a donor journey audit, a new digital presence. Each one designed backwards from your retention goals so that every touchpoint reflects what your programs actually achieve.

Perfect fit for: organizations ready to fix the underlying structure, not just the symptoms.

This photo shows a website redesign I completed for NZAVS. Fully CRM integrated and built on Webflow CMS. Funded by LUSH Cosmetics. - BB

are your donors on the road to loyalty?

Person holding a tablet showing Amnesty International's donation campaign with the text 'The Time Is Now' over images of war devastation and displaced people.

Two people at a protest holding signs that say 'Not in my name, not in the name of science' and 'End animal testing, It's time Aotearoa!' with an image of a white lab mouse.

the bellcurve partnership →

From diagnosis to transformation. A three-stage partnership designed to embed results-based thinking into your donor communications, starting at $2,500/month.

Perfect fit for: organizations that want senior-level fundraising expertise, without a full-time hire.

Here I am in Thailand, leading an Asia-Pacific regional strategy workshop as Fundraising and Marketing Director at Amnesty International. - BB

are your donors on the road to loyalty?

your impact reports shouldn't just tick a box

Social impact investors want evidence, not nice words. Whether you're reporting to ESG funders, major donors, or corporate partners, bellcurve brings results-based methodology to impact reporting, so your reports show exactly what their investments have made possible.

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learn more

I'm Bonar Bell, founder of bellcurve.

For the better part of two decades, I've been drawn to organizations that exist to make the world better — working directly with program communities, building impact frameworks, shaping communications strategies, and raising millions of dollars for good.

Twenty years of experience. Field visits to 25+ countries. Leadership roles at ChildFund, Amnesty International and Christian Children's Fund. A career built on understanding why donors stay.

I created bellcurve to close the gap between the impact you create and the stories your supporters deserve to hear.

about bellcurve

Photos of Bonar Bell during field visits across 20+ countries

"What stands out most is Bonar's ability to blend creativity with practicality. Whether it was crafting visually stunning designs, developing user-friendly websites or devising effective fundraising strategies, he approached every task with innovation and precision. He is not only incredibly talented but also reliable and dedicated to achieving the best possible results."

Tara Jackson,

Beyond Animal Research (BAR)

"Bonar is both strategic and a big-picture, creative thinker. He prides himself on professionalism and is highly driven and solutions-focused. He is also one of those rare individuals who can turn their hand to anything to get the job done (and his high standards means he does it well!)."

Shona Jennings,

ChildFund New Zealand

"Bonar has proven skills across a wide range of disciplines, including developing and executing strategy, creating and implementing successful campaigns... He researches effectively, identifies trends and opportunities, plans effectively and delivers outstanding results consistently."

Leanne Tiscornia,

ChildFund New Zealand

"Bonar is a truly gifted and talented communications and project manager. What sets Bonar apart is his enthusiasm and genuine caring about the outcomes and overall success of every project he manages. He gives 110% effort while delivering unique insights and valuable perspectives that truly make a difference."

Christine Lukewich, CFRE,

Christian Children's Fund of Canada