El coste sube.

Because coste is a masculine noun in Spanish, so it takes el.

• el coste = the cost
• un coste = a cost

This is something you mostly just have to learn with the noun. The ending -e does not always tell you whether a noun is masculine or feminine.

Sube is the third-person singular form of the verb subir, which usually means to go up, to rise, or to increase.

In El coste sube, it means:

• The cost rises
• The cost is going up
• The cost increases

So sube is describing what the cost is doing.

Spanish often uses the simple present where English might prefer is going up or is increasing.

So:

• El coste sube can mean The cost rises or The cost is going up
• El coste está subiendo means The cost is rising right now / is in the process of going up

Both are possible, but the simple present is very common in Spanish for general statements and current trends.

Because sube already includes the idea of it rises / it goes up.

Spanish verbs usually pack the subject information into the verb ending, so a separate word like is is often unnecessary.

• subo = I go up
• subes = you go up
• sube = he/she/it goes up

In this sentence, sube already means goes up / rises.

Spanish normally omits subject pronouns when the meaning is clear.

Here, el coste is already the subject, so you do not need an extra pronoun.

• El coste sube = The cost goes up

Adding a pronoun would usually be unnecessary and unnatural here.

They are very similar, but there is a regional preference.

In Spain, coste is common. In much of Latin America, costo is often more common.

So:

• Spain: el coste de la vida
• Latin America: el costo de vida or el costo de la vida, depending on the region and expression

A learner of Spanish from Spain should definitely recognise and use coste.

Yes. Subir has both a literal and a figurative use.

Examples:

• El ascensor sube. = The lift goes up.
• La temperatura sube. = The temperature rises.
• El coste sube. = The cost increases.

So here it is being used in the figurative sense of rising/increasing.

Because subir here is being used intransitively, meaning it does not take a direct object in this sentence.

So el coste is the thing doing the action:

• El coste sube. = The cost rises.

Compare with a transitive structure:

• La empresa sube los precios. = The company raises prices.

There, la empresa is the subject and los precios is the object.

Yes, but the meaning is slightly different.

• El coste sube = The cost goes up
• El precio sube = The price goes up

Coste is cost, while precio is price. They are related, but not always interchangeable.

For example:

• El coste de producción sube. = The production cost rises.
• El precio del producto sube. = The product’s price rises.

In standard Spanish pronunciation, sube is pronounced roughly like SOO-beh.

A more accurate guide:

• su = like soo
• be = like beh

Stress falls on the first syllable: SU-be

The b in Spanish is softer than a strong English b, especially between vowels, but for a beginner SOO-beh is a good approximation.

Yes. The Spanish present tense often covers both ideas.

El coste sube can mean:

• a general fact: The cost rises
• a current trend: The cost is going up

Context tells you which meaning is intended.

For example:

• Cuando hay escasez, el coste sube. = When there is scarcity, the cost rises.
• Este mes, el coste sube mucho. = This month, the cost is going up a lot.

Yes, very close.

• El coste sube
• El coste aumenta

Both mean that the cost increases.
However, sube is often a little more everyday and vivid, like goes up, while aumenta can sound slightly more formal or neutral, like increases.

Both are perfectly correct.