The RTP TCO calculator: we show you every one of our formulas. Check whether they match your reality

Key takeaways

• We show every formula. An open RTP TCO methodology is a deliberate choice, not a marketing trick: logic you can see is logic you can check and challenge. Among the Polish packaging calculators we know of, that is still the exception.
• TCO ≠ purchase price. What counts is the total cost of ownership over time: on the single-use side, the repeated purchase and the environmental charge (EPR), whose rates today are an assumption rather than a fact written into law; on the RTP side, acquiring the fleet, replacing it periodically, washing, reverse logistics and losses.
• Cost, not saving. The calculator answers the question “how much does PPWR compliance really cost me, and when do the two costs draw level?” – not “how much will I earn?”. It is a tool for planning a cost.
• The result is directional (break-even), not a hard figure. We deliberately give no single “magic” payback number in złoty, for three reasons: plastics and energy prices move, EPR rates do not yet follow from an enacted act, and most companies have no rotation data of their own.
• Put in your own numbers wherever you have them. The wizard asks you for six things: industry and process, the single-use type, the annual volume, the single-use unit price, the number of cycles and the analysis horizon. Every other parameter sits in the model’s configuration – which is exactly why we list them all below, together with the formulas they feed into.
• You will find every formula below – in the section “Every formula, in turn”: both cost paths, the break-even point and the three parameters that move the result most.

Why we show every formula

There is a familiar pattern in the marketing of reusable packaging: the calculator as a black box. You feed in data, an impressive result drops out – usually a large “saving over 5 years” – and the methodology stays hidden, because the methodology is what either convinces or exposes. The trouble is that for the person who has to stand behind that figure, the finance director or the controller, an opaque result is useless. They cannot defend it to the board, cannot wire it into their own model, and have no way of checking whether anyone has stretched the assumptions.

So we invert the industry default. We show the formulas not despite being a manufacturer but because we are a manufacturer – and we have the figures to work from. We write as re-use practitioners, not as lawyers: what interests us is how much it costs, what that cost is made of and when it pays back. Openness is also the simplest answer to greenwashing. It is hard to pin an “eco-marketing” label on someone who puts a sheet with every variable on the table and says: run the numbers yourself, put in your own data, challenge ours.

There is an element of controlled controversy in this, and we will say it plainly: we believe that a calculator which shows only a “saving” while hiding the formula is misleading. We are not pointing at any particular tool or company – we are describing a pattern, not naming entities. But we will not pretend that all calculators are equally honest. Openness is the card we play.

What TCO is and why the purchase price lies

The purchase price of packaging is a fraction of what it truly costs. TCO (total cost of ownership) is the sum of everything the packaging costs over the whole period in which it actually works, not on the day you buy it. For single-use packaging the sum looks simple: you buy, you use once, you throw away – and you buy again, month after month, for years. On top of that comes the layer of environmental charges (EPR), whose rates today are an assumption rather than a figure written into law. For an RTP system the logic runs the other way: you pay more at the start, but you spread that cost over hundreds of cycles. This is precisely the packaging whose re-use is governed by Article 29 of the PPWR.

The full TCO of a returnable system covers far more than the “price of the crate”. It is made up of: acquiring the container fleet, washing and inspection, reverse logistics (the “empty” return leg), storage, losses (breakage), periodic replacement of the worn fleet – a real, recurring cost rather than a one-off – plus the marking and record-keeping of the loop, and, at the very end, the residual value of the fleet. RTP is not “buy once and for all”: the fleet wears out and has to be renewed from time to time, which is why we count replacement as a recurring cost. On the single-use side you have to add what is easiest to forget: the repeated purchase over time and the rising regulatory cost – we set out the regulation’s full calendar of obligations in our PPWR guide. Only when you put those two curves side by side over a horizon of several years does the comparison say anything useful. That is exactly what the calculator does.

Which particular set of variables the tool models, and how, we describe in the formulas section. We build the logic from scratch, starting from a question that industry calculators rarely ask: which data you can supply off the top of your head, and which it makes sense for us to add on our side. A tool that does not separate the two is pretending to omniscience.

“Cost, not saving” – how to read the result

The most important design decision behind this calculator is conceptual, not technical. It is not a savings counter. Moving to RTP is an investment: capex, the operating cost of the loop and the periodic replacement of a fleet that wears out. It pays back only over time, across many cycles, and the moment it does depends on rotation, the redemption rate and the routes you actually run. A tool that promises a “saving” at the outset is selling a simplification: it assumes the loop will close, the containers will come back and prices will stay put. In practice, any of those three assumptions can turn into a risk variable.

So the question the calculator answers is: “how much does PPWR compliance really cost me in my process, and from what point is RTP cheaper than single-use?” – not “how much will I earn?”. The same figure, framed as a cost to be planned for, is worth far more to a CFO than a promise of profit, because it can go into a budget rather than into a presentation. It is also the more honest framing: we show the point at which the costs draw level (break-even), not an airbrushed “return”.

Why the result is directional, not accurate to the last złoty

The commonest CFO question is: “then give me the payback in złoty”. We deliberately do not – and that is a feature, not a flaw. A single payback figure would suggest a precision that simply does not exist today. There are three reasons, and each one is sufficient on its own:

1. Prices move. The cost of plastics, energy and transport can change within a few weeks. A hard payback figure would go out of date faster than you could put it in front of the board.
2. EPR has no final act yet. Environmental charge rates are a moving target in Poland – they depend on the shape of the implementation (UC100, the draft Polish act implementing the PPWR). Writing an “exact” rate for years ahead would be guesswork dressed up as fact. Why EPR and the PPWR are two separate layers of cost we explain in EPR and PPWR – two charges, not one; we follow the progress of the Polish act in a separate, regularly updated piece on UC100.
3. Most companies do not yet know their own data. The real redemption rate, the actual return routes and breakage are numbers you simply do not have before a pilot. Without them, any “exact” amount is fiction in a good font.

The result is therefore directional: it shows which way the balance tips, roughly when, and what moves it most. That is enough to identify the levers and the viability threshold without feigning a certainty that does not exist. Anyone who promises a universal threshold of “X cycles to payback” for every company is simply guessing.

Check whether they match your reality

An open methodology only means something if you can do something with it. The wizard asks you for six things: industry and process, the type of single-use packaging, the annual volume, the unit price of the single-use option, the number of cycles per year and the analysis horizon. On those numbers the PPWR cost calculator works out both cost paths; you will find it in our PPWR knowledge hub. The remaining values – the washing cost, the distance of the return loop, the loss per cycle, the charge rates – come from bekuplast’s industry assumptions and are fixed in the tool. We are not hiding them from you: every one is listed below, next to the formulas, together with where it comes from.

That is the whole idea behind “check whether they match your reality”: we are not asking you to believe our assumptions, but to question them. Where we lean on public data we give the source with attribution – industry benchmarks point to up to 120 re-use cycles for RPC-type crates, with a service life of the order of 7–12 years (Reusable Packaging Europe, factsheet 2022). Where we rely on our own practice as a manufacturer (prices per SKU, breakage, rotation curves), we say so plainly and give the formula that value feeds into – you can substitute your own and work out the difference in your own spreadsheet.

An illustrative scenario (directional, not a client case). A company is weighing up swapping single-use cardboard for a collapsible RTP crate on one repeatable domestic route. Into the calculator it puts its own unit cost of cardboard, its annual volume and the number of cycles it expects on that route. The result does not read “you will save X PLN”. It reads: “on your assumptions the costs draw level after roughly N cycles – converted into time: RTP becomes cheaper from about year X of use”. Above that point RTP is cheaper; below it, dearer. What N actually is depends on your data, which is why we show the formula rather than a magic number.

The surer the redemption rate and the shorter the loop, the sooner the curves cross. It happens fastest in in-plant circuits and short B2B loops, typical of industrial production and intralogistics. The models for organising the loop itself – your own pool, rental or pooling – we compare separately, in the article on pallet pooling. Pooling, for that matter, is market context and an option on the customer’s side, not a bekuplast service: we manufacture containers, we do not run pooling.

Every formula, in turn

The model calculates two cost paths over the same horizon and looks for the moment their cumulative costs draw level. You set the horizon yourself, anywhere from 1 year to 15 years.

Notation: V – annual packaging volume [units/year], H – horizon [years], t – year number.

In the “Where the value comes from” column we separate three things, because they decide how much of this calculation you actually control. Wizard means a field you fill in yourself; there are six of them: industry and process, the type of single-use packaging, the annual volume, the single-use unit price, the number of cycles per year and the analysis horizon. Configuration is a value built into the model, the same for every user – only a new version of the tool changes it. Administrator is a parameter we update on our side, because prices and charge rates change over time and we do not want the calculator working on last year’s values.

1. The single-use path – every year from scratch

Single-use packaging is used up in a single cycle, so every year you buy the full volume again. On top of the purchase price comes the environmental charge, levied every time, on the mass of packaging placed on the market.

EPR_su  =  (m_cardboard + m_film) × s_EPR × k_eco TCO_su(year)  =  V × c_su  +  EPR_su × V TCO_su(H)     =  H × TCO_su(year)

The single-use cost curve is linear: it rises by the same amount every year, and there is no point at which the cost stops accruing.

2. The RTP path – an investment, then upkeep

On the returnable packaging side, year one differs from the years that follow. In year one you buy the whole fleet; in later years, only what has been lost from it. That is why fleet replacement is a recurring cost in the model, not a one-off.

Fleet₁           =  (V ÷ n_cyc) × b Replacement      =  Fleet₁ × u × n_cyc Washing          =  Fleet₁ × c_wash × (n_cyc ÷ f_wash) Transport_cycle  =  d × s_FTL ÷ (PU × 24) Transport        =  Fleet₁ × n_cyc × Transport_cycle EPR_RTP          =  m_RTP × s_EPR,RTP × k_eco,RTP TCO_RTP(year 1)    =  Fleet₁      × c_RTP + Washing + Transport + EPR_RTP × Fleet₁ TCO_RTP(year t≥2)  =  Replacement × c_RTP + Washing + Transport + EPR_RTP × Replacement

Two things in this notation do most of the work. First, Replacement = Fleet₁ × u × n_cyc – the loss is multiplied by the number of cycles, so a loop with high rotation and a weak return rate can eat through a fleet faster than intuition suggests. Second, Transport_cycle divides the cost of a journey by how many carriers fit in the vehicle once collapsed – and that is the point at which a carrier’s collapsibility stops being a catalogue attribute and becomes a line in the calculation.

3. The break-even point

Both cumulative curves are linear, they simply start in different places. Single-use rises from zero in a constant step C. RTP starts high (A – the fleet purchase) but then rises more slowly (B – upkeep and replacement). Where these two straight lines cross is the break-even:

t*  =  (A − B) ÷ (C − B)      for C > B where:  C = TCO_su(year)   A = TCO_RTP(year 1)   B = TCO_RTP(year 2)

The condition C > B matters substantively: if annual upkeep of the fleet costs more than the annual purchase of single-use packaging, the curves never cross, and the calculator says so outright instead of drawing a break-even beyond the horizon. Alongside the continuous value, the model also gives a discrete year – the first year in which the cumulative RTP cost is no longer higher than the single-use one.

The result takes a directional form: “RTP cheaper from about year X” or “within this horizon single-use remains cheaper”. We deliberately do not convert it into a single savings figure, for the reasons set out above.

4. What the result rests on most

Three parameters move the break-even more than all the others put together:

• The redemption rate (through u). It enters the formula multiplied by the number of cycles, so it acts as a lever. In the calculator itself u is a constant – we take one conservative assumption for every industry. In your own company this is precisely the item you influence through procedure rather than purchasing; if your real return rate differs from our assumption, recalculate this term separately, because the difference comes back into the result multiplied by n_cyc.
• The price of the plastic (through c_RTP). It raises the starting point A, which shifts the intersection to the right. It follows raw-material prices, so we treat it as a value that changes over time and update it together with our price list.
• The assumed EPR rate (through s_EPR). It steepens the single-use curve C, so the higher it is, the earlier the break-even. And that is exactly why it is the riskiest parameter in the whole model.

A caveat to read before you use the result. The EPR rates and the eco-modulation multiplier are a working assumption in this model, not a regulatory fact. The Polish implementing act has not been passed, so no rate in PLN/kg is binding law today. If the legislator sets them differently, the slope of the single-use curve will shift, and with it the break-even point. You cannot swap the rate in the wizard: we update it on our side when the legal position changes. But that is precisely why we publish the formula – s_EPR enters the calculation linearly, so a rate twice as high doubles that item of the single-use cost. Substitute your own assumption at this point in your own spreadsheet before you base a purchasing decision on the result.

Four things we deliberately leave outside the TCO calculation: pooling (a business model, not a cost item in this comparison – we break it down in a separate article), CO₂ emissions, recycled content and compliance with the PFAS restrictions. Each has its own methodology and its own units; thrown into a single financial result, they would turn it into a number that cannot be defended.

FAQ

What is the RTP TCO calculator? It is a tool that compares the total cost of ownership (TCO) of single-use packaging and reusable transport packaging (RTP) over a multi-year horizon, taking in not only the purchase price but also the operating costs of the return loop and the environmental charges. The result shows when the costs draw level, directionally.

How is TCO different from the purchase price? The purchase price is a single day; TCO is the whole working life of the packaging. Single-use packaging you buy over and over, with the EPR charge on top; RTP you buy less often, but the fleet wears out and needs periodic replacement, and washing, reverse logistics and losses come on top of that. A sound decision is made on TCO, not on the invoice price.

Will the calculator tell me how much I will save? Not in that form. We deliberately calculate a cost, not a “saving”. The tool shows how much PPWR compliance really costs in your process and from what point RTP becomes cheaper than single-use, without a promise of profit that cannot be guaranteed.

Why do you not give an exact payback figure in PLN? Because it would feign a precision that does not exist today: plastics and energy prices move, EPR rates do not yet follow from an enacted act, and most companies do not yet know their own redemption rate. That is why the result is directional (break-even) rather than a point figure.

Where do your figures and formulas come from? From two sources, always kept apart: public benchmarks with attribution, and parameters from our own practice as a manufacturer. In the wizard you enter six things – industry, single-use type, annual volume, single-use price, the number of cycles and the horizon; every other parameter is fixed in the tool. We publish the full set of formulas and the origin of every value openly in this article, so you can put them into your own spreadsheet and check whether the result matches your reality.

Where do I find the calculator itself? In the PPWR knowledge hub – at TCO.