Two offers for a pool or hot tub can show the same figure on the bottom line, and yet be completely different jobs. One company includes excavation, the electrical connection, transport, crane handling, inspection and operator training in the price. The other offers just the construction and technology for the same amount — the rest is ordered separately by the customer, usually at the point when the contract is already signed and backing out is expensive. The difference in such a “hidden” price can easily reach tens of thousands of crowns and surfaces exactly when it’s hardest to negotiate.
This article shows how to compare offers by the same scope, not by the last digit on the invoice — what specifically to check, what to ask the supplier, and which signals reveal that a cheaper offer is missing something significant.
Why comparing only the total price makes no sense
The total price is the sum of many partial decisions — what scope of work the company included in the offer, what technology and material it will use, how long and how specific a warranty it gives, when it will actually finish the job, and under what payment terms. When you look only at the final figure, you’re actually comparing two different products that happen to come out at a similar amount.
A typical example: offer A at 480,000 CZK includes groundwork, transport, technology installation, electrical inspection and an hour of operator training. Offer B at 460,000 CZK lists only the delivery and installation of the shell or liner — excavation, crane transport, electrical connection and inspection are “as actually incurred” and billed separately. After adding up the missing items, offer B may end up more expensive than A — but the customer only finds this out once construction is under way.
Before you start comparing price, first compare the scope. Only once both offers cover the same items under the same conditions does it make sense to discuss which one is cheaper.
What exactly to compare: checklist and item table
The differences between offers hide in six areas. Go through them for both offers one by one, and note down a question for the supplier for any item that is missing or only described in general terms.
1. Scope of work
What will the company physically do, and what remains with the customer or another supplier? Groundwork and base preparation, transport and crane handling, structure assembly, technology hookup, filling and first start-up, site cleanup after completion.
2. Material and technology
The offer should name a specific brand and model, not just a general category like “quality filtration”. You’re interested in the pump and filtration output relative to the pool volume, the type and thickness of the liner or shell material, the heating output and efficiency, and the disinfection method.
3. Warranty
Warranty for pools and hot tubs is usually split into three parts of different length — the structure or shell, the technology, and the installation work performed. The offer should state a specific number of years for each part, not just a general wording like “warranty as required by law”.
4. Completion date
You’re interested in a real start and completion date, not just an approximate “in spring”. Ask what happens in case of delay — whether there’s a contractual penalty.
5. Payment terms
The amount and timing of deposits, when the final payment is due and under what conditions. A high upfront deposit not tied to work progress increases the risk.
6. What is NOT included in the price
This is where the most expensive surprises arise. Explicitly check with both offers whether the price includes: excavation work and soil removal, electrical inspection, transport and crane handling, operator training and handover of documentation.
| Area | What to check | What’s most often missing |
|---|---|---|
| Scope of work | Who does the excavation, assembly, hookup, start-up | Groundwork, site cleanup |
| Material and technology | Specific brand, model, output | Filtration and heating parameters |
| Warranty | Years separately for structure, technology, work | Warranty on installation work |
| Completion date | Specific date, penalty for delay | Penalty for missing the deadline |
| Payment terms | Deposit amount, tied to work progress | Terms for the final payment after handover |
| What’s not in the price | Excavation, inspection, transport, training | Electrical inspection, crane, transport |
How to ask the supplier about the differences
The goal of the following questions isn’t to catch the supplier out, but to understand why the offers differ. A solid company can answer each of them specifically and without hesitation.
- “What exactly is included in the price and what costs extra?”
- “What brand and model of technology do you offer, and why that one?”
- “Who arranges the excavation, soil removal and electrical connection?”
- “What is the warranty separately for the structure, the technology and the installation work?”
- “What is the binding completion date and what happens if it’s delayed?”
- “What do the payments look like — how much and when is the deposit, when is the final payment due?”
- “Who performs the electrical inspection and operator training after handover?”
- “How does service and spare parts availability work after the warranty ends?”
- “Can you provide a reference from a similar project, ideally with a customer contact?”
Red flags of a cheap offer
None of the following flags alone means fraud. The signal is their accumulation, and above all how the supplier reacts when you ask about a missing detail.
- Vaguely described technology. Wording like “complete technology” without a brand, model or output.
- Missing or only approximate deadline. “Completion in spring” instead of a specific date with a penalty.
- Warranty only “as required by law”. Without a breakdown of years separately for the structure, technology and work performed.
- Items “as actually incurred”. Excavation, transport or crane without a stated price or at least an estimate.
- High upfront deposit. Payment approaching 100% of the price without being tied to work progress.
- No verifiable references. A company with no history of projects or unwilling to give a customer contact.
- Verbal promises outside the written offer. “We’ll sort that out, don’t worry” for an item missing from the offer.
- Missing company identification. An offer without a company ID number, registered address or verifiable contact.
When a price difference is justified
Not every price difference signals a problem. Offers legitimately differ according to the actual quality of the material and technology, whether the company works with its own trained installation team or subcontracts the installation, how busy it is in a given season, and the region. An established company with good references and a full schedule can usually afford a higher price, because demand for its services exceeds its capacity.
Such a difference isn’t a reason for suspicion — it’s a reason to ask what specifically it’s based on, and to compare it with a concrete benefit, instead of automatically rejecting the more expensive offer or automatically accepting the cheaper one.
How to use the comparison in practice
The simplest way to make the comparison clearer is to score both offers on the same criteria — not just price, but also scope, warranty, deadline and references. Our offer comparison calculator is designed exactly for this: enter the parameters of both offers and the calculator works out which one comes out objectively better, even if it’s not the cheapest.
Before you close the comparison, also read the related article what to check in a pool or hot tub offer and contract. And if a significantly cheaper option caught your eye, first read a cheap pool offer: what might be missing from the price.
Don’t want to compare on your own?
If something still doesn’t add up even after comparing offers, or you’re still gathering offers, you don’t have to handle everything yourself from scratch. Through the inquiry form, send a single request and get three comparable offers from vetted suppliers right away.
Frequently asked questions
Does it make sense to send a supplier a competing offer and ask why it’s more expensive or cheaper?
Yes. The goal isn’t to force a discount, but to understand the difference in scope. A solid supplier will explain what exactly it does differently. If the answer stays evasive, that’s a signal in itself.
What must be in the offer in writing?
The scope of delivery and work, specific material and technology, price broken down by item, completion date, warranty terms separately for the structure, technology and work, payment terms, and liability for defects.
Is the cheapest offer automatically the worst?
Not necessarily. The cheapest offer can be fine if it covers the same scope as the others. The problem arises when it’s cheaper only because it leaves out something significant.
How many companies does it make sense to approach before deciding?
Three comparable offers are usually enough to see the spread in both price and scope.
What to do if the supplier refuses to break down the price by item?
Take it as a warning sign. A price breakdown by scope of work, material and services is a standard requirement for a job worth hundreds of thousands of crowns.
How do I know that a warranty “as required by law” isn’t enough?
The statutory warranty doesn’t distinguish between the structure, the technology and the work performed, which usually have different lifespans. A solid supplier gives a longer contractual warranty on the structure and a separately shorter one on the technical components.
Do I have to compare offers manually, or is there a tool?
Manual comparison works fine using the checklist, but for a faster result you can use the offer comparison calculator.
Next step
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