Education · Reg 267026
The Institute of Acoustics Limited
Charity rating & review
78/100 Clarity Score · 4 stars · Charity Commission filings · How we score
Clarity score
Good
Quick answer
Is The Institute of Acoustics Limited a good charity?
The Institute of Acoustics Limited scores 78/100 (4 stars, Good) on CharityCompare's Clarity Score, calculated from its UK regulator filings. Its latest accounts year is 2024 (£1.3m total income, 74% of spending on charitable activities). This reflects financial transparency and stewardship on paper — not the real-world impact of its programmes. See the full breakdown.
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What does The Institute of Acoustics Limited do?
The Institute of Acoustics Limited is a registered charity (no. 267026) working in education across the United Kingdom. Its latest Charity Commission filing directs 74% of spending to charitable activities, holding roughly 12 months of reserves, though its recent accounts were filed late. Reported income has been broadly stable over recent years. CharityCompare's Clarity Score rates the organisation only from public Charity Commission accounts — accountability, financial health, efficiency and community support — not the quality or impact of its programmes.
Summarised from public filings — The Institute of Acoustics Limited hasn't added its own description yet. Work here? Add it free →
In short: THE INSTITUTE OF ACOUSTICS LIMITED scores 78 out of 100 (4 stars). 74% average program spend (3-year average). Review the pillar breakdown below.
What is The Institute of Acoustics Limited?
The Institute of Acoustics Limited has a Clarity Score of 78 out of 100 on CharityCompare (4 stars, Good). Charity Commission registration number 267026. Status: Registered. Primary cause area: Education. Latest accounts year 2024: total income £1.3m, with 74% of expenditure on charitable activities. Accounts filing: late. Reserves: approximately 12 months of operating costs. 2 filing concern(s) noted on this profile. Scores are independent and based on official filings — not a donation recommendation.
Data from Charity Commission register, last updated .
Overall score
78/100
4★ · Good
Cause spend
74%
3-yr avg · charitable activities
Accountability
75/100
Finance beacon
Income
£1.3m
Latest year 2024
Reserves
12 mo
Months of running costs
Accounts filing
Late
Check register
£3.6 raised per £1 fundraising (3-yr avg) · 38% overhead · Website on register · Confidence: medium
How does THE INSTITUTE OF ACOUSTICS LIMITED compare?
Clarity Score percentile against similar UK charities — the share of peers THE INSTITUTE OF ACOUSTICS LIMITED scores higher than.
Scores higher than 46% of 2,776 charities in its income band · 78/100 vs 78 peer average (marker).
Scores higher than 57% of 579 charities in this cause · 78/100 vs 74 peer average (marker).
How reliable is The Institute of Acoustics Limited's data?
- Source
- Charity Commission (England & Wales)
- Accounts year
- 2024
- Filing date
- Profile reviewed
Medium confidence — some data missing or late
Scores reflect the latest annual accounts on the register. Clarity Score measures how clearly the charity accounts for money in those filings — not programme impact.
Contains public sector information licensed under the Open Government Licence v3.0. Sources: Charity Commission for England and Wales, Office of the Scottish Charity Regulator and Charity Commission for Northern Ireland. Open Government Licence v3.0 .
What is The Institute of Acoustics Limited's Beacon report?
Detailed accountability and finance metrics from UK regulator filings — structured for transparency in our four-beacon report.
Accountability & Transparency
Baseline trust from filing discipline, board oversight, and declared governance policies.
75/100
| Metric | Score | Value |
|---|---|---|
| Filing history (5 years) 100% on-time over five years = 15 pts · one late filing = 5 pts · two or more = 0 pts. | 33% | 5/15 pts |
| Trustee oversight Three or more trustees on the register = 15 pts, scaled down for fewer (governance red flag below three). | 100% | 17 trustees · 15/15 pts |
| Declared policies Safeguarding (4) · conflict of interest (3) · volunteer management (3) — from Charity Commission annual return. | 100% | 10/10 pts |
Financial Health
Stability and solvency — reserves, revenue trend, and debt from Charity Commission accounts.
93/100
| Metric | Score | Value |
|---|---|---|
| Reserves (months of cash) 3–24 months = full marks, tapering on both sides · 0 months or 4+ years (hoarding) = 0 pts. | 100% | 12 months · 15/15 pts |
| Income stability / growth +20% or more over the window = 10 pts · flat = 5 pts · −20% or worse = 0 pts, scaled between. | 90% | 9/10 pts · 3-year average |
| Liabilities to assets 0% liabilities-to-assets = 5 pts, scaling down to 0 pts at 60%+ debt. | 80% | 16% · 4/5 pts |
Financial Efficiency
How efficiently funds reach the cause — program spend and fundraising cost ratios.
50/100
| Metric | Score | Value |
|---|---|---|
| Program expense ratio 90%+ on charitable activities = full marks, scaling down to 0 pts at 50% or below. | 60% | 74% · 6/10 pts (3-year average) |
| Fundraising efficiency ≤10p to raise £1 = full marks, scaling down to 0 pts at 40p or above (fundraising cost ÷ income). | 40% | 28p per £1 income · 4/10 pts (3-year average) |
Community Support
Grassroots backing from Charity Commission workforce data — volunteers vs paid staff.
100/100
| Metric | Score | Value |
|---|---|---|
| Volunteer-to-staff ratio Volunteers at 2x staff or more = full marks · no volunteers = 0 pts, scaled between. | 100% | 50 volunteers / 7 staff · 10/10 pts |
What is The Institute of Acoustics Limited's Clarity Score?
78/100 total · Good · 4 of 5 stars
Four pillars (40 + 30 + 20 + 10 points) from Charity Commission filings — see methodology for full weightings.
Accountability & Transparency
Baseline trust from filing discipline, board oversight, and declared governance policies.
75/100
Financial Health
Stability and solvency — reserves, revenue trend, and debt from Charity Commission accounts.
93/100
Financial Efficiency
How efficiently funds reach the cause — program spend and fundraising cost ratios.
50/100
Community Support
Grassroots backing from Charity Commission workforce data — volunteers vs paid staff.
100/100
How much does The Institute of Acoustics Limited raise and spend?
Latest filed year 2024 · Source: Charity Commission filings
| Category | Amount | % of spend |
|---|---|---|
| Total income | £1.3m | — |
| Total expenditure | £1.5m | — |
| Charitable activities | £1.1m | 76% |
| Fundraising | £353k | 24% |
| Governance & admin | £176k | 12% |
Where does the money go?
Latest accounts (2024) · £1.5m spent
- Charitable activities76% · £1.1m
- Fundraising24% · £353k
- Governance12% · £176k
What trust indicators does The Institute of Acoustics Limited have?
Pulled from the Charity Commission register — filing behaviour, board size, and workforce where reported.
-
Accounts filed on time
Filing status: late
-
Trustee board size (3–12)
17 trustees on the Charity Commission register
-
Workforce on register
7 employees · 50 volunteers (7:1 volunteer-to-staff)
Fundraising Regulator
Status not yet checked
Separate from our financial scores — shows whether the charity follows the Code of Fundraising Practice.
Check Fundraising Regulator →Official register
Reg 267026
Full trustee list, accounts, and regulatory history on the Charity Commission.
View on Charity Commission →Trustees & officers
- Alistair William McIntosh Somerville Chair · since 2020
- Dr Yoyou Liu since 2020
- Fiona Elizabeth Rogerson since 2020
- Reena Motilal Mahtani Mirchandani since 2020
- Charles Daniel Goodhand since 2021
- Prof David Waddington since 2022
- Peter Rogers since 2022
- Hilary Notley since 2022
- Matthew Charles Torjussen since 2023
- James McIntyre since 2023
- Richard Adrian Perkins since 2023
- Daniel Krzysztof Saunders since 2024
How we score charities +
The Clarity Score is a 100-point rating from UK regulator filings (Charity Commission for England and Wales, OSCR and CCNI). Four pillars — Accountability & Transparency (40), Financial Health (30), Financial Efficiency (20), and Community Support (10) — each scored on a continuous scale, not pass/fail cutoffs. A statutory inquiry sets the score to 0 automatically.
Accountability & Transparency
Scored from filings
40 points — filing history (15), trustee oversight (15, scaling up to a board of three or more), declared policies (10).
Financial Health
Scored from filings
30 points — reserves (15, full marks 3–24 months, tapering on both sides), income stability (10), liabilities to assets (5, scaling down as debt rises).
Financial Efficiency
Scored from filings
20 points — program expense ratio and fundraising cost, each on a graduated scale (not a single cutoff). Kept at 20% of the total: financial-ratio scoring alone is not a reliable effectiveness signal (see "why not just an overhead ratio?" below).
Community Support
Scored from filings
10 points — volunteer-to-staff ratio from Charity Commission workforce data, scaling continuously up to a 2:1 ratio.
Overall score
Sum of all pillar points. Display stars use the same bands as the labels: 90–100 → 5★ Exceptional; 75–89 → 4★ Good; 60–74 → 3★ Needs improvement; 1–59 → 2★ Poor; 0 → not rated.
How have The Institute of Acoustics Limited's finances changed over five years?
- Income
- Spending
- Cause spend
Values in £ thousands · Cause spend plotted only when the filing discloses a split · Source: Charity Commission accounts
What are the key facts about The Institute of Acoustics Limited?
- Overall score
- 78/100 (4★)
- Income
- £1.3m
- Cause spend
- 74% of expenditure
- Reg number
- 267026
- Scope
- UK-wide
- Reserves
- 12 months
- Trustees
- 17
- Accounts year
- 2024
- Filing
- late
How does THE INSTITUTE OF ACOUSTICS LIMITED compare, and where else can you look?
Where THE INSTITUTE OF ACOUSTICS LIMITED sits
The causes this charity is classified under, and other charities working nearby.
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Top-rated peers by CharityCompare score
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- EALING AND HOUNSLOW COMMUNITY VOLUNTARY SERVICE 99/100 · £953k
How can you share The Institute of Acoustics Limited's rating?
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What red flags does The Institute of Acoustics Limited have?
Frequently asked questions
Common questions about The Institute of Acoustics Limited's rating, finances, and Charity Commission status.
Is The Institute of Acoustics Limited a good charity? +
The Institute of Acoustics Limited scores 78 out of 100 (4 stars — Good) on CharityCompare's Clarity Score, our independent read of its UK regulator filings. Around 74% of its spending goes to charitable activities and its accounts are late. That reflects how transparent and financially healthy it looks on paper — it does not measure the real-world impact of its work, so treat it as one factor alongside the cause you care about. CharityCompare never tells you where to donate.
Is The Institute of Acoustics Limited a legitimate charity? +
Yes — The Institute of Acoustics Limited is a legitimate registered charity (charity number 267026). Verify it on the official register: https://register-of-charities.charitycommission.gov.uk/en/charity-search/-/charity-details/267026. Registration proves status; Clarity Score then summarises filing transparency on paper, not programme impact.
What is The Institute of Acoustics Limited's charity number? +
The Institute of Acoustics Limited's charity number is 267026. Check that number on the official register (Charity Commission, OSCR or CCNI) or this CharityCompare profile before you donate — scammers sometimes reuse real numbers on fake appeals.
What is The Institute of Acoustics Limited's charity rating? +
The Institute of Acoustics Limited scores 78 out of 100 on CharityCompare (4 stars — Good). The Clarity Score V1 sums four pillars from UK regulator filings: Accountability & Transparency (40 pts), Financial Health (30), Financial Efficiency (20), and Community Support (10). Stars use the same bands as those labels — 90+ is 5★ Exceptional. It is not an impact ranking.
Does The Institute of Acoustics Limited have reviews and complaints? +
CharityCompare does not host public user reviews for The Institute of Acoustics Limited. Instead you get a filing-based Clarity Score, cause spend, reserves and red flags such as late accounts (2 filing concern(s) noted on this profile). For formal complaints about a charity, contact the Charity Commission, OSCR, CCNI or the Fundraising Regulator as appropriate.
How much of my donation reaches The Institute of Acoustics Limited? +
According to its 2024 regulator filing, 74% of The Institute of Acoustics Limited's total spending went to charitable activities (3-yr avg across disclosed years). That is the closest official figure to "how much of your donation reaches the cause" — it is an average across all spending in the filing, not a pound-by-pound breakdown of an individual gift.
What are The Institute of Acoustics Limited's overheads? +
According to its 2024 regulator filing, fundraising costs were about 26% of total expenditure and combined overheads (fundraising plus governance) were about 38% of total expenditure at The Institute of Acoustics Limited. The filings CharityCompare uses do not publish CEO or senior-staff pay, so we cannot say what The Institute of Acoustics Limited's chief executive is paid — where disclosure rules apply, senior pay appears in the trustees' annual report on the Charity Commission register.
How much income does The Institute of Acoustics Limited receive? +
The Institute of Acoustics Limited reported £1.3m total income in its 2024 accounts, based on UK regulator filings. Five-year trend: stable.
Are The Institute of Acoustics Limited's accounts up to date? +
Filing status: late (last filing 2026-06-24). CharityCompare flags late or missing accounts separately from the financial score.
Where is The Institute of Acoustics Limited based? +
The Institute of Acoustics Limited is listed at Milton Keynes · UK-wide · MK9 2AF and operates UK-wide, focused on education.
How does CharityCompare score The Institute of Acoustics Limited? +
We calculate a Clarity Score of 0–100 from four pillars in The Institute of Acoustics Limited's regulator filings: Accountability & Transparency (40 points — filing history, trustees, policies), Financial Health (30 — reserves, income trend, debt), Financial Efficiency (20 — cause spend and fundraising cost, on a graduated scale) and Community Support (10 — volunteer-to-staff ratio). An open statutory inquiry scores 0. The score measures reporting on paper, not programme impact. CharityCompare is free for donors, takes no commission on donations, and scores cannot be bought.
How often is this page updated? +
This profile was last updated on 17 July 2026 from the latest UK regulator data available to CharityCompare, and The Institute of Acoustics Limited's most recent accounts cover 2024. Scores and figures refresh whenever we re-ingest the register, so the page reflects our latest data pull rather than a one-off review.