Do both parties need to explicitly agree upon price of service before doing it?
<p>For example, when one goes to dentist, he might ask you "Do you want me to fix cavity for you?" without explicitly disclosing the price for the service at that time. Then, if you say "Yes", they do the service and disclose price <em>only after service</em> is already rendered.</p>

<p><strong>What puts obligation to the consumer to pay for this service, if price wasn't explicitly disclosed before the service was actually rendered (e.g. when I went to the dentist for the first time, did he ask me to sign a written contract that mentions that it is my responsibility to check how much he would charge to fix cavity)?</strong></p>

<p><em>I have encountered different dentists in my life and some of them explicitly mention the price before doing the service while others don't.</em> </p>

<p>The parties don't need to explicitly agree on the price beforehand, unless a law explicitly requires it for a specific kind of transaction. Contracts do not need to have all terms explicitly spelled out for those terms to be binding; it is expected that dental care has a cost, and if you don't explicitly specify the cost then it's assumed you're willing to pay a reasonable fee. They can't charge you six million dollars for a bandage, but there's a <em>very</em> wide range of fees considered "reasonable" for a doctor to charge. If you care more about the price, it's your responsibility to work these things out yourself before saying "yes." The dentist does not need to make you sign a written contract saying it's your job to check, because when you agreed to the care without asking about the price you <em>already</em> agreed to pay whatever would be charged (subject to the fact that courts will not enforce an unconscionable contract).</p>

<p><a href="http://www.ncsl.org/research/health/transparency-and-disclosure-health-costs.aspx#Legislation" rel="nofollow">California law</a> requires hospitals to provide someone without insurance a written <em>estimate</em> of healthcare costs upon request, as well as requiring any hospital with a master list of charges for services to make it available to the public and to give anyone (on request) a list of average charges for 25 common outpatient services. It does not require medical charges to be set out in advance without a request, just like other fields of commerce aren't generally <em>required</em> to do that.</p>

<h3>Contracts require "meeting of minds"</h3>

<p>I disagree with another answer to this question. Specifically, the part that says:</p>

<blockquote>
  <p><em>Contracts do not need to have all terms explicitly spelled out for those terms to be binding;</em></p>
</blockquote>

<p>That is incorrect. In fact, contracts have to meet several requirements in order to be valid, binding and enforcable. Most of those requirements are irrelevant to this question... However, one of those requirements is that the parties must have a <strong><em>meeting of the minds</em></strong> as to what they are agreeing. If there is no meeting of the minds on all the terms, then there is no contract. This is a common way contract disputes arise. Lack of clarity of the terms of the contract. And this is how contract disputes land in the legal system.</p>

<h3>Contracts are statutory; without one, payment becomes a matter of equity</h3>

<p>However, no contract does not mean you don't have to pay. You have to pay as a matter of <strong><em>equity</em></strong> which is a common law principle. The contract would be a statutory basis for owing payment. Without a contract, equity and common law kicks in. Specifically, the principle of <strong><em>unjust enrichment</em></strong> becomes the issue. So a court would have to determine the <strong><em>fair value</em></strong> of the services rendered and you would then owe the fair value.</p>

<p>You could just avoid the potential for a later price dispute by agreeing to the price before hand. But, as the question points out, this is not always done in practice.</p>

<h3>Settlement terms revert to the court</h3>

<p>That said, if you don't agree on price before hand the other party doesn't just get to charge whatever they want. If they charge more than you are willing to pay, then force them to sue you and a judge will determine what you owe. Both sides will have to present evidence supporting their determination of the value of the services rendered.</p>

<p>But, as mentioned, this can be avoided by either agreeing to the price in advance or an after-the-fact negotiation to arrive at a fair price for settlement.</p>

california consumer-protection