The verdict in three sentences
A charity managing 8,000 sponsorships on spreadsheets and a generic CRM loses donations with every failed Direct Debit and every misplaced child letter. A custom sponsorship platform costs, as a 2026 order of magnitude, between £35,000 and £80,000 in London for a 4 to 6 month project. The real legal issue is minors' data under UK GDPR, which requires a Data Protection Impact Assessment (DPIA) before going live.
What the software must connect, and what it costs
Sponsorship is a three-sided business: the donor in the UK, the child and family in the field, and the head office team that links them. A standard charity CRM handles the first side well and the other two poorly. The core need fits in one central object, the sponsorship record, which links a donor, a child, a programme, a Direct Debit mandate, a Gift Aid declaration and a letter history.
| Module | Function | 2026 order of magnitude (GBP) |
|---|---|---|
| Donor and sponsorship record | Links donor, child, programme, history | 7,000 to 13,000 |
| Direct Debit (Bacs) | Mandates, AUDDIS, ARUDD failure handling | 5,000 to 12,000 |
| Gift Aid | Declarations, HMRC Charities Online claims | 3,000 to 6,000 |
| Child letters and photos | Field collection, moderation, delivery to sponsor | 6,000 to 14,000 |
| Offline field app | Visit logs, photos, 3G sync | 8,000 to 19,000 |
| Online sponsor portal | Updates, one-off gifts, bank detail changes | 4,000 to 10,000 |
| Head office dashboards | Failure rate, unsponsored children, retention | 2,000 to 4,000 |
The low end covers a UK-only scope with web forms for field data. The high end adds an offline mobile app for field staff in Senegal, Burkina Faso or Togo, where connectivity is intermittent. On the supplier side, Kolonell prices this kind of complex application in its 7M to 15M+ FCFA band (10,670 to 22,870+ EUR), with maintenance from 35,000 to 120,000 FCFA per month depending on service level.
Gift Aid and minors' data: the work that sets the timeline
Gift Aid adds 25p for every pound donated by a UK taxpayer, so on £30 a month it is worth £90 per sponsor per year. Missing declarations are lost money. A child record holds a name, photo, date of birth, school, sometimes family or health details. The ICO treats processing of vulnerable children's data as high risk, so a DPIA is in practice mandatory, and transfers to partners outside the UK need an International Data Transfer Agreement.
| Requirement | Concrete measure in the software | Timeline impact |
|---|---|---|
| DPIA | Data mapping, risks, mitigations | 2 to 4 weeks upfront |
| Minimisation | No health data visible to sponsors | Screen design |
| Access rights | Head office, field, sponsor, finance roles | Built into development |
| Photos | Blurring of third parties, logged parental consent | 1 to 2 weeks of moderation |
| Hosting | UK or EU servers, encryption at rest | None if chosen early |
| Retention | Archive 3 years after sponsorship ends | Automated purge script |
| Gift Aid audit trail | Declaration date, wording, source stored | Built into donor record |
A realistic plan: 4 weeks of scoping and DPIA, 10 to 14 weeks of development, 3 weeks of data migration from spreadsheets, then 2 to 4 weeks of testing with two pilot programmes. The Gift Aid claim flow should be ready before the next quarterly submission.
Mini case study
Helen, director of a sponsorship charity in London, supports 8,000 children in Senegal and Togo, with an average gift of £30 a month. Her Direct Debit failure rate is 2.8%, about 224 failed collections a month, a third of which are never followed up: 75 sponsorships lost per month, £2,250 of monthly giving. Over a year, the cumulative loss approaches £27,000, plus the Gift Aid on it. Add 1.5 full-time staff re-keying letters and Gift Aid data, about £55,000 fully loaded. A £60,000 platform that chases failures automatically and halves the re-keying frees about £54,000 a year: payback in 13 to 14 months, before maintenance. This scenario is illustrative.
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FAQ
Is an off-the-shelf charity CRM enough for sponsorships?
Below 1,000 sponsorships, often yes, at £150 to £600 a month. Beyond that, linking donor, child and letter becomes the weak point and teams drift back to spreadsheets.
How long does it take to migrate 8,000 existing records?
Allow 3 weeks, including one week of de-duplication. In charity databases, 5 to 10% of donor records are typically duplicates.
Are Gift Aid claims generated automatically?
Yes, the platform produces the HMRC claim file from valid declarations. A quarterly claim drops from several days of work to under an hour.
Can we send children's photos to sponsors without a GDPR risk?
Yes, with logged parental consent, moderation before sending, and a secure sponsor portal instead of email attachments. Photos are deleted 3 years after the sponsorship ends.
What maintenance budget should we plan?
Between 10 and 15% of the initial cost per year, so £6,000 to £9,000 for a £60,000 project. That covers Bacs and HMRC changes plus security updates.
Let's scope your project. Send us your number of sponsorships, countries of operation and current tools, and we will price the scope, indicative budget and go-live timeline. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
