Best Price-Quality Ratio (BPQR) — Formulas and Scoring

For Belgian public contracts where price alone is not enough — because quality, methodology or sustainability also matter — the contracting authority uses the best price-quality ratio (BPQR) as the award method. The idea is straightforward: price and quality each receive a score, weighted according to predetermined coefficients, and the offer with the highest total score wins. Practice is less straightforward: the choice of price formula, weightings and sub-criteria fundamentally determines who wins the contract — often more than tenderers realise.

This article describes the mechanics of BPQR: the legal basis, the common price formulas with worked examples, how weightings are chosen, how sub-criteria are structured, and which mistakes recur.

BPQR in the legal framework

The Belgian Act of 17 June 2016 (Article 81) distinguishes three award methods:

1. Lowest price — only the price counts; the offer with the lowest price wins, provided it is regular.
2. Lowest cost based on cost-effectiveness — for example life-cycle costing (LCC). Broader than pure price, but still a simple cost model.
3. Best price-quality ratio (BPQR) — price and quality are weighed against each other.

In European terminology, BPQR is called MEAT (Most Economically Advantageous Tender). Belgian law uses “BPQR” (or BPKV in Dutch / MRQP in French); other EU countries use their own translations of MEAT.

For some procedures, BPQR is in practice mandatory: the competitive procedure with negotiation, the competitive dialogue and the innovation partnership are difficult to operate when the authority would only want to award on price. The law does not explicitly exclude price-only there, but the nature of these procedures — negotiation, dialogue, innovation — makes price-alone practically ineffective.

The anatomy of a BPQR evaluation

A typical BPQR evaluation runs in four steps:

1. Define sub-criteria each with their own weighting. Together all sub-criteria add up to 100%.
2. Calculate a score per sub-criterion — using a formula (for price) or an evaluation matrix (for quality).
3. Compute the weighted total score — score per criterion × weighting.
4. Rank — the offer with the highest total score wins, provided it is regular and not abnormally low.

The decisive design choices sit in step 1 (which weightings?) and step 2 (which price formula? which evaluation matrix for quality?). That is where most of the difference is made in practice — and where most of the legal risk lies.

Price formulas in practice

The contracting authority must explicitly state in the tender specifications which formula it uses to convert prices into points. Four formulas appear regularly.

Formula 1 — Linear, lowest price = maximum points

The most-used formula:

Price_score = (Lowest_price / Offered_price) × Max_points

Example (max points = 60, three offers):

Simple, transparent, common for most contracts. Drawback: compresses price differences — an offer 30% more expensive only loses 23% of the price points here. With a high weighting for price (60% or more) this is usually no issue; with equal or lower weighting, quality can easily overcompensate.

Formula 2 — Linear between lowest and highest

Price_score = Max_points × (1 − (Offered_price − Lowest_price) / (Highest_price − Lowest_price))

Example (same data):

Spreads the scores across the entire range. Drawback: a single extreme outlier (a wildly expensive offer) skews the entire field — everyone else receives relatively many points. Authorities using this formula sometimes provide a correction: outliers receive 0 and are removed from the spread calculation.

Formula 3 — Points deduction per percent gap

Price_score = Max_points × (1 − (Offered_price − Lowest_price) / Lowest_price)

Example:

Sits between formulas 1 and 2. An offer 10% more expensive loses 10% of the maximum points. More intuitive for some authorities than formula 1.

Formula 4 — Hyperbolic / non-linear formulas

In specific cases — for example when the authority wants to prevent a tenderer with an unrealistically low price from emptying the entire field — non-linear formulas are used. They are legally sensitive and must be very clearly motivated. Without proper motivation, an authority runs the highest annulment risk here.

Weightings — price versus quality

How much should price weigh relative to quality? There is no legal obligation; the choice must be proportionate to the object and transparently announced in the tender specifications.

Four patterns recur in practice:

An 80% price / 20% quality split for a complex IT implementation is hard to defend — the authority would do better to use lowest price than to create the appearance of quality assessment. Conversely, 30% price / 70% quality for a simple delivery of office chairs is disproportionate — a dispute over the weighting is then foreseeable.

Sub-criteria within quality

The quality part of a BPQR evaluation is rarely assessed as a whole. It is split into sub-criteria with their own weightings. Typical examples for a services contract:

Important: each sub-criterion must be either quantitatively assessable (numbers, certificates) or assessed against a pre-announced evaluation matrix with scoring scales (e.g. “excellent = 5, good = 4, satisfactory = 3, weak = 2, insufficient = 1”). A sub-criterion “quality of approach” without further explanation of what is good or weak is legally vulnerable — the Council of State has repeatedly annulled award decisions on that basis.

Abnormally low prices

An offer with a strikingly low price (e.g. 30-40% below the average) is not automatically irregular, but the authority is required (Article 36 RD on Award 2017) to request written justification. The tenderer is given the chance to explain why the price is realistic — for instance through specific production processes, economies of scale, or strategic market positioning.

If the explanation is convincing, the offer remains in contention. If it does not convince — or if the price is clearly not cost-covering and indicates dumping — the authority must reject the offer as irregular. This mechanism is the counterpart to the price formulas: a too-low price cannot simply empty the field without justification.

For tenderers, this means: an aggressively low price without underpinning is an exclusion risk, not a winning guarantee.

BAFO and final offers

In the competitive procedure with negotiation, competitive dialogue and innovation partnership, the authority may request best and final offers (BAFO) after an initial evaluation. Tenderers can then revise their price and/or quality proposal based on what they learned during the negotiation phase.

The BPQR evaluation rules apply unchanged to final offers. Award criteria cannot substantively change between rounds — only the offers evolve. It is permitted, however, to slightly refine sub-criterion weightings between rounds, provided this was foreseen in the procedural rules of the specifications.

Common pitfalls

Overly complex formulas. Authorities using polynomial or composite formulas more often face legal challenges. A formula that cannot be explained in a single line is generally too complex.

Subjective sub-criteria without a matrix. “Quality of approach” as a sub-criterion with 30% weight but no evaluation matrix is a classic ground for annulment.

Unclear summation formula. Does the authority work with a weighted sum of scores, or with a ratio (quality/price or price/quality)? With a ratio, the arithmetic effect can differ from the intent. The formula must be explicitly stated.

No sub-criterion weights in the specifications. When the authority generally states “quality counts for 40%” without specifying the internal split of that 40%, tenderers cannot know where to focus their effort. The Council of State has for several years required that sub-criterion weightings be announced in advance, not only during evaluation.

Inverse incentives. Theoretically possible but rarely intentional: a formula that accidentally gives higher scores as the price rises. Occurs in poorly calibrated hyperbolic formulas.

Too low a price weighting for commodities. When quality barely differentiates — e.g. 100 deliveries of identical office chairs to the same standard — a weighting of 50% or more for quality is hard to justify. The authority would do better to use lowest price.

Practical tips for tenderers

Read the formula first. For a serious BPQR opportunity, the first action is: identify the price formula and the sub-criterion weightings. Calculate on a worksheet what a 5% and 10% price reduction yields in points. That gives a sense of where the margin yields the most.

Invest where the weight is high. If methodology weighs 35% and planning 8%, put your best writing into methodology. A good action plan on a sub-criterion weighted at 8% rarely makes the difference.

Read the evaluation matrix. Sub-criteria are often assessed on a 1-5 or 0-10 scale. The difference between “satisfactory” and “good” can be substantial — ask for clarification via the forum if the matrix is vague.

Account for competitor pricing. If three strong competitors will sit in the same range, an aggressive price drop of a few percent is worth little within formula 1 — quality points then yield more.

Ask when in doubt. Ambiguous formulas, missing matrices or inconsistent weightings are the moments to submit a question via the forum. A clarifying information note often saves your strategy.

→ How selection criteria differ from award criteria — a frequent confusion that can legally undermine your dossier.

Sources

• Act of 17 June 2016 on Public Procurement — FPS BOSA
• Royal Decree of 18 April 2017 (Award classical sectors) — FPS BOSA
• Directive 2014/24/EU — EUR-Lex
• Evaluation methodology — FPS BOSA