The RNID has challenged other charities to produce documents similar to its own 'impact report', and warned that charities risk losing public support if they don't become more transparent and open to scrutiny.
In its fourth annual impact report, the RNID says that as the voluntary sector grows in influence, trust will only be maintained if people are aware of how charities really work.
John Low, the RNID's chief executive, claimed: "If we're not too careful, we'll end up in a situation where no-one really understands what we're doing."
According to Low, statutory reporting is rooted in financial results, which don't measure a charity's progress effectively: "We need to find a way of measuring soft assets."
The impact report, attempts to do this by rating charities' progress against a series of publicly disclosed goals. Forestalling any accusations of it being a PR stunt, it details instances where targets were not met.
The RNID spent around £8,000 this year to produce 15,000 copies of the report, which it is distributing to potential partners, funders, and politicians.