Why Tenants Who Recycle More Pay Less on Wastify

Abstract#

In a multi let office building the waste bill is usually split by floor area. A tenant that separates every stream pays the same rate per square metre as a tenant that sends everything to general waste. This blog tests one question: when waste costs are allocated by verified weight does a tenant that recycles more pay less and what drives the difference. It draws on the WRAP Gate Fees Report for 2024/25 and 2025/26 and five peer reviewed studies of weight and unit based charging located through Google Scholar. It sets them beside the worked illustration and the case study published by Wastify AI. It then reads the result against three compliance rules: Simpler Recycling and the waste hierarchy duty and the RICS service charge standard. The finding is that two forces combine. The first is price. In 2024/25 the median gate fee for residual waste sent to energy from waste was £121 per tonne against £24 for food waste sent to anaerobic digestion: about five times as much. The second is behaviour. Municipalities that charge by weight collect less waste and weight based systems move behaviour more than volume based ones. Floor area allocation removes both forces. Verified weight restores them and leaves a tenant level record against each of the three rules.

Key Findings#

1. Treatment cost depends on the route a tonne takes. In the WRAP Gate Fees Report 2024/25 the median gate fee for residual waste sent to energy from waste was £121 per tonne. Food waste sent to anaerobic digestion was £24 and the net gate fee at a materials recovery facility was £42. In 2025/26 the anaerobic digestion median fell to £13 while energy from waste medians rose in every category surveyed [2 3 4].
2. Floor area allocation removes that price signal. In the illustration published by Wastify AI two tenants of 400 square metres each pay £1,610 under a floor area split. Under verified weight the diligent recycler pays £1,035 and the heavy contaminator pays £2,185. The building recovers £3,220 either way and the recycler pays 35.7% less [1]. The RICS service charge standard asks for an apportionment that clearly reflects the availability and benefit and use of services [11].
3. Charging by weight changes behaviour. Swedish municipalities with pay by weight schemes collected 20% less household waste per capita than other municipalities [5]. A ten year study of all 458 Dutch municipalities found that weight based systems reduce garbage more than volume based systems and raise recycling with no evidence of waste tourism or illegal dumping [6].
4. Weight is the right unit. When households in Charlottesville paid by the bag they cut the volume of their garbage by 37% but its weight by only 14% [7]. A meta analysis of 25 studies found that much of the variation in price response is explained by weight based systems while bag based systems show no significant relation [8].
5. On the platform a multi tenant Central London estate raised verified recycling from 39% to 68% in six months after weight based recharging and contamination alerts were introduced [1]. Separating those streams is a legal duty for workplaces in England under Simpler Recycling [9] and applying the waste hierarchy is a duty under regulation 12 of the Waste (England and Wales) Regulations 2011 [12].

1. Introduction#

1.1 The Question#

A waste bill has two inputs: how much each stream costs to collect and treat and how that cost is divided between occupiers. In most multi tenant buildings the second input is floor area. A multi let building recovers shared services through the service charge and the waste line is divided by the space each occupier leases. Under that rule the choices a tenant makes in the waste room have no effect on what it pays.

This blog asks one question. When waste costs are allocated by verified weight does a tenant that recycles more pay less and what drives the difference. Put shortly: does recycle more pay less hold. The question can be tested. If every stream cost the same per tonne and if charging by weight did not change behaviour then the allocation method would only move cost around. The evidence below shows that neither condition holds.

1.2 Why This Matters Now#

Two developments have made the answer matter more in 2026 than it did two years ago.

First the price gap between routes is widening. WRAP reports that the median gate fee for food waste sent to anaerobic digestion fell from £24 to £13 per tonne in 2025/26 and that new contracts reported a median of £7 [4]. Over the same period the median gate fee for energy from waste rose in all three categories surveyed [2]. The one category quoted in the trade press is bulky waste only which rose from £164 to £182 per tonne [3 4]. A tonne of food that leaves a building in the wrong bin is becoming more expensive relative to a tonne that leaves in the right one.

Second separate streams are now a legal requirement. Since 31 March 2025 workplaces in England have had to separate dry recyclable materials and food waste from non recyclable waste. Micro firms with fewer than ten full time equivalent employees have until 31 March 2027 [9]. The Environment Agency can issue compliance notices and the guidance states that these can also be issued against landlords or facilities management companies that present waste on behalf of the waste producer [9]. Regulation 12 of the Waste (England and Wales) Regulations 2011 separately requires every establishment that produces waste to take all measures that are reasonable in the circumstances to apply the waste hierarchy [12]. The bins are in place. Whether occupiers use them well depends in part on whether using them well changes what they pay. Buildings collecting Simpler Recycling evidence meet the same question from the compliance side.

1.3 Scope and Structure#

This blog covers waste costs recovered from occupiers in multi tenant commercial buildings in England. It proceeds in six sections.

• Section 2 Describes the method and the sources.
• Section 3 Sets out four findings.
• Section 4 Discusses what they mean for tenants and building teams.
• Section 5 States the limitations.
• Section 6 Answers the question.

It does not model the contract prices of any individual building. Those depend on the trade waste agreement and on local markets. It reads three published compliance rules and is not legal advice.

2. Method#

2.1 Research Design#

The blog combines three evidence streams. The first is market price data: the median gate fees published by WRAP for the main treatment routes. The second is peer reviewed research on charging for waste by weight or by unit. Five studies were located through Google Scholar and each abstract was read at the publisher or at a recognised index. The third is material published by Wastify AI: a worked illustration of a floor area split against a weight split and an anonymised case study. Platform totals from the live counter on the Wastify AI homepage provide scale. The findings are then read against three compliance rules: Simpler Recycling [9] and the waste hierarchy duty [12] and the RICS service charge standard [11].

2.2 Sources#

Every external source was opened directly on 6 October 2026. Where the full WRAP report could not be retrieved its figures were taken from trade press reports of the survey and that is stated as a limitation in section 5.

Table 1: Sources consulted

Source: compiled for this blog from the references listed at the end.

2.3 Platform Data#

The fairness illustration is published on the Wastify tenant recharging page. It shows two tenants of 400 square metres each in the same building and the bill each receives under a floor area split and under a verified weight split. It is an illustration and not a measured building. The case study describes one anonymised multi tenant estate in Central London where verified recycling rose from 39% to 68% in six months.

Platform totals were read from the counter on the Wastify AI homepage on 6 October 2026. The counter carried a timestamp of 5 October 2026. It showed 5,107,000+ kg weighed at disposal and 949,000+ verified weighings. It showed £650k+ recharged on verified data and 380+ companies reporting through the platform. Public totals are rounded down.

2.4 Calculations#

The ratio of residual to food waste gate fees is £121 divided by £24 which gives 5.04 and is stated as about five times. The ratio of residual to net materials recovery facility gate fees is £121 divided by £42 which gives 2.88. The saving on each tonne of food moved from residual waste to anaerobic digestion at 2024/25 medians is £121 minus £24 which gives £97. At 2025/26 medians the same saving is at least £121 minus £13 which gives £108 because the energy from waste median rose. In the illustration the building total is £1,610 multiplied by two which gives £3,220 and equals £1,035 plus £2,185. The recycler saving is £575 divided by £1,610 which gives 35.7%. The same £575 divided by the building total of £3,220 gives 17.9%. The contaminator pays £2,185 divided by £1,035 which gives 2.11 times the recycler. The contaminated tonne in section 3.1.1 is £82 plus half of £121 which gives £142.50 and is stated as about £143. The case study change is 68% minus 39% which gives 29 percentage points. Every derived figure was recomputed from the stated inputs before publication.

3. Findings#

3.1 The Price of a Tonne Depends on Where It Goes#

A gate fee is the charge a treatment facility makes for accepting a tonne of waste. It sits underneath every collection price. WRAP surveys these fees each year and Table 2 sets out the medians for the routes a commercial building uses most.

Table 2: Median UK gate fees by treatment route

Source: WRAP Gate Fees Reports 2024/25 and 2025/26 as reported in [3] and [4] with the energy from waste trend from [2].

The pattern is consistent. Residual waste is what remains once recyclables have been separated out. It is collected as general waste and sent for recovery. Where that recovery is energy from waste the median gate fee in 2024/25 was £121 per tonne [3]. Food waste sent to anaerobic digestion cost a median of £24 in the same year and £13 in 2025/26 [3 4]. Dry mixed recycling sorted at a materials recovery facility carried a net median of £42 in both years [3 4].

At 2024/25 medians a tonne of residual waste cost about five times as much to treat as a tonne of food waste and about 2.9 times as much as a tonne of dry mixed recycling on the net fee. Every tonne of food that moves out of the general waste bin and into the food bin removes about £97 of treatment cost at the gate. The 2025/26 figures widen that gap rather than narrow it: the same tonne removes at least £108. Gate fees do move from year to year. The anaerobic digestion median was £20 in 2023/24 before it rose to £24 and then fell to £13 and ten local authorities reported a negative gate fee for anaerobic digestion in 2025/26 [2 3 4]. In both survey years the residual route was the most expensive route in Table 2.

3.1.1 Rejects Turn Recycling Back Into Residual Waste#

The saving only holds for clean material. Rejects are the material a sorting facility cannot recover and sends on as residual waste. A recycling bin with a high contamination rate pays for sorting and then pays again for the portion that leaves as residual. As an illustration at 2024/25 medians a tonne sorted at the gross fee of £82 with half of it rejected to energy from waste at £121 per tonne would cost about £143 if the rejected half were charged on top [3]. On that basis a contaminated tonne of recycling can cost more than the general waste it was meant to replace. That is why contamination belongs in the same allocation as weight.

3.2 Floor Area Allocation Removes the Price Signal#

The price gap in Table 2 is real at building level. Under floor area allocation it never reaches the occupier that created it. The illustration published by Wastify shows what happens to two tenants of identical size [1].

Table 3: The same building split two ways

Source: illustration published on the Wastify AI tenant recharging page [1]. Change column computed for this blog.

Under the floor area split both tenants pay £1,610. The published caption notes that the recycler subsidises the contaminator and that neither can prove it. Under the verified weight split the recycler pays £1,035 and the contaminator pays £2,185: 2.11 times as much. The recycler pays 35.7% less than under floor area and the contaminator pays 35.7% more. The split moves £575 from one tenant to the other: 17.9% of the building total.

The mechanism is the allocation itself. Wastify records the costs of a building each month and applies cost allocation by stream and disposal outcome across tenants by their verified share. A tenant that sends more of its waste to the cheaper routes carries less of the expensive ones. Each occupier then receives tenant statements by stream and outcome so the reason for the change is visible on the page [1].

The allocation also answers a compliance test. Section 3.2 of the RICS professional standard on service charges in commercial property asks for a basis of apportionment that is demonstrably fair and reasonable and that clearly reflects the availability and benefit and use of services [11]. The two tenants in Table 3 have the same availability and a different use. Floor area can show the first. Only weight can show the second.

3.2.1 What the Building Recovers Does Not Change#

The total in Table 3 is £3,220 under both methods. A recharge passes a cost to the specific occupier that caused it rather than sharing it across the building. Changing the method changes who pays. It does not change what the building recovers. The saving to the recycler is the subsidy it no longer pays.

3.3 Charging by Weight Changes Behaviour#

Price alone would justify the allocation on grounds of fairness. The research literature adds a second effect: when people pay by weight they produce less waste and separate more of it. Table 4 summarises five peer reviewed studies.

Table 4: Peer reviewed studies of charging for waste by weight or by unit

Source: published abstracts of the five studies [5 6 7 8 10].

The Swedish study of pay by weight billing found that municipalities with weight based schemes collected 20% less household waste per capita than other municipalities [5]. The Dutch study of unit based garbage pricing covered all 458 Dutch municipalities over ten years. It found that weight based systems reduce garbage more than volume based systems and that user fees increase recycling especially of paper. It found no evidence of waste tourism or illegal dumping [6].

The Oostzaan study of weight based pricing found significant and sizeable price effects. The response for compostable waste was four times as large as the response for non recyclable waste and long run responses were about 30% larger than short run responses [10]. The heaviest wet stream moved most. In a commercial building that stream is food.

3.3.1 Why Weight and Not Volume#

The unit of charge decides what changes. In the Charlottesville study of pricing garbage by the bag 75 households cut the volume of their garbage by 37% but its weight by only 14%. Recyclable weight rose by 16% and the authors estimated that suspicious disposal accounted for 28% of the reduction seen at the kerb [7]. Paying by the bag rewarded compaction as much as it rewarded separation.

The meta analysis of unit based pricing reached the same point across 25 studies. Much of the variation in price response is explained by the use of a weight based system and by the pricing of compostable waste. The bag based system shows no significant relation [8]. Wastify charges on net weight recorded at the kiosk through PIN and weigh capture at source so pressing more into a bag changes nothing on the bill.

3.4 What the Platform Shows#

The published case study describes one multi tenant estate in Central London. After kiosks and weight based recharging and contamination alerts were introduced verified recycling rose from 39% to 68% in six months: a rise of 29 percentage points. The recharge stopped being disputed because every line opened to a record [1].

Across the platform 949,000+ weighings covering 5,107,000+ kg have been recorded at the moment of disposal and £650k+ has been recharged on verified data [1]. Every one of those charges rests on a weight and a stream rather than on a share of floor area.

A recycling bin only saves money when the saving reaches the tenant that used it. Wastify AI delivers waste intelligence for commercial buildings where every kilogram is weighed and attributed before any cost is allocated.

4. Discussion: What This Means for the Reader#

4.1 For Tenants#

Table 2 ranks the levers. The largest gap is between residual waste and food waste so the first action is to keep food out of the general waste bin. The second is clean segregation at the point waste is thrown away because contamination converts recycling back into residual cost. The third is to reduce the total. The Swedish evidence shows that less waste overall is the most reliable effect of paying by weight [5].

Every kilogram of recoverable waste found in a general waste bin is recyclable material paying the residual rate. Under floor area allocation that cost is shared by the building. Under verified weight it is paid by the occupier that put it there. That is the whole of the incentive and it is why the research finds the response grows over time [10].

4.2 For Property Managers and Landlords#

The price signal reaches tenants only if the building can see its own costs by stream. A trade waste agreement that prices each stream separately passes the gap in Table 2 through to the building. One that blends every stream into a single rate hides it before any allocation begins. Most contracts are priced per collection so the cost per tonne of each stream depends on how full the containers are when they leave. Collection weighing before the bins leave gives the building that figure for itself.

The incentive also aligns cost with the waste hierarchy: prevention first then preparing for reuse then recycling then other recovery and disposal last. The hierarchy is a legal duty as well as good practice. Regulation 12 of the Waste (England and Wales) Regulations 2011 requires an establishment that produces waste to take all measures that are reasonable in the circumstances to apply it [12]. A tenant that follows the hierarchy pays less as a result. A building that allocates by floor area asks tenants to follow the hierarchy while charging them as if they had not.

Compliance risk sits with the building too. Under Simpler Recycling a compliance notice can be issued against a landlord or facilities management company that presents waste on behalf of the waste producer [9]. A record of weight by stream for each tenant shows who separated and who did not. Wastify lists ten waste compliance frameworks that its records are built to evidence: Simpler Recycling 2025 and Digital Waste Tracking and EPA Duty of Care and EWC Coding and CSRD and ESRS E5 and GRESB and BREEAM and SECR and ISO 14001 [1].

4.3 What the Research Does Not Promise#

The literature is honest about its limits and so should a building be. The Swedish study found that none of the 20% difference could be explained by higher recycling rates [5]. The Dutch study found that user fees increase recycling but not nearly as much as they reduce garbage [6]. The Charlottesville study found that part of the reduction was suspicious disposal [7]. Paying by weight reliably reduces residual waste. It does not guarantee that every kilogram removed reappears in a recycling bin. In a building the equivalent risk is waste moved between occupiers. Attribution by PIN at the kiosk with a photograph on every record is the control for that risk.

5. Limitations#

This blog has five limitations that a careful reader should weigh.

1. The gate fees are WRAP medians drawn largely from local authority responses. Commercial contract prices include collection and vary by region and by contract. The full 2025/26 report could not be retrieved so the residual energy from waste median for that year is not quoted and the like for like comparison uses 2024/25. Specific figures are taken from trade press reports of the WRAP surveys.
2. The five studies concern household waste in Sweden and the Netherlands and the United States. Commercial occupiers buy waste services through a service charge rather than a municipal fee and may respond differently.
3. The fairness figures in Table 3 are a published illustration and not a measured building. They show how the allocation works rather than the size of the effect in any particular building. The contaminated tonne in section 3.1.1 is also an illustration: it assumes that rejects are charged on top of the sorting fee and contracts differ on that point.
4. The case study is one estate. Kiosks and weight based recharging and contamination alerts were introduced together so the rise from 39% to 68% cannot be attributed to pricing alone. Buildings on the platform chose to measure their waste which is a selection bias.
5. Platform totals are rounded down and grow daily.

6. Conclusion#

A tenant that recycles more pays less on Wastify for two reasons. The first is price: residual waste costs several times as much to treat as food waste or clean dry mixed recycling. The second is allocation: verified weight passes each occupier its own tonnes by stream and outcome so the price gap reaches the tenant that created it. Floor area allocation removes both and leaves the recycler paying for the contaminator. The research adds a third reason that matters over time: when people pay by weight they produce less waste and the response grows. The rules point the same way: separation is a duty under Simpler Recycling [9] and the waste hierarchy is a duty under regulation 12 [12] and the RICS standard asks for a share that reflects use [11]. Recycle more pay less is arithmetic before it is a slogan.

A building that wants to see where its own costs sit can take the two minute waste data check before the next service charge budget is set.

Let every occupier keep the saving it earns in the waste room. Book a demo with Wastify AI for a one hour session tailored to your buildings.

Frequently Asked Questions#

Why does recycling more reduce a tenant waste charge?#

Because costs are allocated by verified weight and by stream rather than by floor area. Residual waste costs more per tonne to treat than food waste or clean recycling so a tenant that moves material out of general waste carries less of the most expensive stream [3]. Separating those streams is also a legal duty for workplaces in England under Simpler Recycling [9].

How much more does residual waste cost to treat?#

In the WRAP Gate Fees Report 2024/25 the median gate fee for residual waste sent to energy from waste was £121 per tonne. Food waste sent to anaerobic digestion was £24 and the net fee for dry mixed recycling was £42 [3 4].

Does the building recover less when tenants recycle more?#

No. In the published illustration the building recovers £3,220 under both methods. The split changes. The total recovered does not [1].

Is the diversion rate the same as the recycling rate?#

No. The diversion rate counts waste sent for recycling or recovery rather than disposal. The recycling rate counts recycling only. Both are calculated from weight so both depend on measuring it.

Why charge by weight rather than by bag or by bin?#

Because volume can be compressed. In one study households cut garbage volume by 37% but weight by only 14% when charged by the bag [7]. Waste weighed at source records the weight of each disposal at the moment it is thrown away.

Does paying by weight cause dumping or waste tourism?#

The ten year study of all 458 Dutch municipalities found no evidence of waste tourism or illegal dumping [6]. In a building each disposal is attributed by PIN at the kiosk and photographed so waste moved to another occupier leaves a record.

How quickly does a tenant see the effect?#

Costs are allocated monthly so a change in separation shows on the next statement. The research suggests the response keeps growing: long run effects were about 30% larger than short run effects in the Oostzaan study [10].

Can a tenant ask which streams drive its charge?#

Yes. Each company sees its own breakdown by stream and by disposal outcome on its statement [1]. The building team can also put the question to Living AI which answers plain English questions about the records with the sources attached.

References#

[1] Wastify AI published material and platform data. Fairness illustration of two 400 square metre tenants as published on the tenant recharging page. Anonymised Central London case study of verified recycling from 39% to 68% in six months as published on the homepage. Platform totals of 5,107,000+ kg weighed and 949,000+ verified weighings and £650k+ recharged for 380+ companies read from the homepage counter on 6 October 2026. Compliance frameworks as listed on the compliance coverage page. wastify.co.uk.

[2] WRAP. UK Gate Fees Report 2025/26. Published 3 July 2026. Key findings on energy from waste and materials recovery facility and organics gate fees. wrap.ngo. Accessed 6 October 2026.

[3] letsrecycle.com. WRAP finds decrease in MRF gate fees. Report of the WRAP Gate Fees Report 2024/25 medians for energy from waste and materials recovery facilities and anaerobic digestion. Published 28 August 2025. letsrecycle.com. Accessed 6 October 2026.

[4] Circular Online. MRF gate fees rise as food waste AD costs fall: WRAP finds. Report of the WRAP Gate Fees Report 2025/26 medians. Published 7 July 2026. circularonline.co.uk. Accessed 6 October 2026.

[5] Dahlén L and Lagerkvist A. Pay as you throw: strengths and weaknesses of weight based billing in household waste collection systems in Sweden. Waste Management 30(1) pages 23 to 31. 2010. doi.org. Accessed 6 October 2026.

[6] Allers MA and Hoeben C. Effects of unit based garbage pricing: a differences in differences approach. Environmental and Resource Economics 45(3) pages 405 to 428. 2010. doi.org. Accessed 6 October 2026.

[7] Fullerton D and Kinnaman TC. Household responses to pricing garbage by the bag. American Economic Review 86(4) pages 971 to 984. 1996. ideas.repec.org. Accessed 6 October 2026.

[8] Bel G and Gradus R. Effects of unit based pricing on household waste collection demand: a meta regression analysis. Resource and Energy Economics 44 pages 169 to 182. 2016. doi.org. Accessed 6 October 2026.

[9] GOV.UK. Simpler recycling: workplace recycling in England. Updated 3 October 2025. gov.uk. Accessed 6 October 2026.

[10] Linderhof V and Kooreman P and Allers M and Wiersma D. Weight based pricing in the collection of household waste: the Oostzaan case. Resource and Energy Economics 23(4) pages 359 to 371. 2001. doi.org. Accessed 6 October 2026.

[11] RICS. Service charges in commercial property. Professional standard UK 2nd edition. Published June 2025 and effective 31 December 2025. Section 3.2. rics.org. Accessed 6 October 2026.

[12] legislation.gov.uk. The Waste (England and Wales) Regulations 2011: regulation 12. Duty in relation to the waste hierarchy. legislation.gov.uk. Accessed 6 October 2026.