Cada tramo horario tiene un precio.

Because cada is followed by a singular noun in Spanish.

• cada tramo horario = each time slot / each time period
• Not cada tramos horarios

This is different from English, where each also normally goes with a singular noun:

• each slot
• each period

So the structure is:

• cada + singular noun

Examples:

• Cada día = each day
• Cada persona = each person
• Cada tramo horario = each time slot

Because cada already works as a determiner, so you do not normally add el / la / los / las before it.

So you say:

• Cada tramo horario...

Not:

• El cada tramo horario...

It works like English each or every, which also does not usually take an article before it:

• Each student
• Every hour

Here, horario is an adjective, not a noun.

You may already know horario as a noun meaning schedule / timetable, but in this sentence it is describing tramo:

• tramo = section, stretch, slot
• horario = related to time/schedule

So tramo horario is a noun + adjective combination.

This is very common in Spanish:

• tren nocturno = night train
• zona escolar = school zone
• franja horaria = time band / time slot

Because in Spanish, adjectives often come after the noun.

So:

• tramo horario literally looks like:
• slot time-related

This is a very normal Spanish word order.

Compare:

• precio alto = high price
• tarifa eléctrica = electricity rate
• tramo horario = time slot / time period

English usually puts adjectives before the noun, but Spanish very often places them after it.

Yes, it is a fairly natural expression, especially in contexts like:

• electricity pricing
• transport schedules
• timetables
• administrative or technical information

In Spain, you may also hear:

• franja horaria

Both can refer to a block or band of time, though the exact preferred term depends on context. In electricity bills and pricing systems, these kinds of expressions are very common.

Because tener is being used to say that each time slot has a price.

• Cada tramo horario tiene un precio. = Each time slot has a price.

Why not es?

• es would identify or describe something.
• Tiene un precio means a price belongs to it or is assigned to it.

Why not hay?

• hay means there is / there are.
• Hay un precio would mean there is a price, which is a different idea.

So:

• tiene = has
• es = is
• hay = there is/are

Because the sentence is making a general statement, not referring to one specific already-known price.

• un precio = a price
• el precio = the price

With un precio, the idea is:

• each time slot has some price assigned to it

If you said el precio, it would sound more like you are talking about a specific price already identified in the conversation.

Compare:

• Cada tramo horario tiene un precio. = Each time slot has a price.
• Cada tramo horario tiene el precio indicado en la tabla. = Each time slot has the price shown in the table.

Because the subject is singular:

• Cada tramo horario = each time slot

Even though cada can refer to many individual items, grammatically it takes a singular noun, so the verb is also singular:

• Cada estudiante tiene...
• Cada casa tiene...
• Cada tramo horario tiene...

Not:

• Cada tramo horario tienen...

Yes. That would also be correct, but it is not exactly the same in tone.

• Cada tramo horario tiene un precio focuses on each individual time slot.
• Todos los tramos horarios tienen un precio focuses on the whole set of time slots.

Both are natural, but cada often feels a bit more distributive: one by one, each one individually.

Sometimes, but the meaning shifts a little.

• tiene un precio = has a price / is assigned a price
• cuesta = costs
• vale = is worth / costs, in some contexts

For example:

• Cada tramo horario tiene un precio distinto. = Each time slot has a different price.
• Consumir electricidad en cada tramo horario cuesta más o menos. = Using electricity in each time slot costs more or less.

So tiene un precio is a more neutral, descriptive way to state that a price exists for each slot.

Both can be possible, but they are not always identical.

• precio = price
• tarifa = rate / tariff / charge

In contexts like electricity, transport, or services, tarifa is often very common because it suggests an official rate structure.

So you might also see:

• Cada tramo horario tiene una tarifa distinta.

That sounds especially natural in regulated pricing or billing contexts. Precio is still perfectly understandable and correct.

In Spain, depending on context, you might also hear things like:

• Cada tramo horario tiene un precio diferente.
• Cada franja horaria tiene una tarifa distinta.
• El precio cambia según el tramo horario.

These are all very natural, especially when talking about electricity rates, transport fares, booking times, or service charges.

The structure is:

• Cada tramo horario = subject
• tiene = verb
• un precio = direct object

So it follows a very standard Spanish pattern:

subject + verb + object

Like:

• Cada alumno tiene un libro.
• Cada habitación tiene un baño.
• Cada tramo horario tiene un precio.

This makes it a very useful model sentence for learning.