Short answer. Double the value of the property. Rule 60, Section 2 requires the applicant to give a bond, executed to the adverse party, in double the value of the property as stated in the applicant's affidavit — which is why the affidavit must state the actual market value of the property being claimed.
What the law says
The applicant must also give a bond, executed to the adverse party in double the value of the property as stated in the affidavit aforementioned, for the return of the property to the adverse party if such return be adjudged, and for the payment to the adverse party of such sum as he may recover from the applicant in the action.
Rule 60, Section 2 — Affidavit and bond. Read the full provision →
Why double, and double of what
The formula is in the section itself: the applicant must also give a bond, executed to the adverse party in double the value of the property as stated in the affidavit aforementioned. So the bond is not fixed by a fee schedule — it is arithmetic on a number you yourself supply, because the supporting affidavit must state The actual market value of the property. Claim a vehicle you value at one million pesos and the replevin bond is two million. The doubling is the price of taking property from someone's hands before any judgment says you may keep it.
What the bond answers for
The bond exists for the defendant's protection, and the section says exactly what it secures: for the return of the property to the adverse party if such return be adjudged, and for the payment to the adverse party of such sum as he may recover from the applicant in the action. Replevin delivers the property at the start of the case, on the applicant's say-so; the double bond is what makes that tolerable. If the case ends the other way, the person who lost possession early has a fund answering both for the thing itself and for whatever the court awards.
The affidavit the bond travels with
The bond accompanies an affidavit, from the applicant or some other person who personally knows the facts, and the section prescribes its contents: that the applicant is the owner of the property claimed, particularly describing it, or is entitled to the possession thereof; that the property is wrongfully detained by the adverse party, with the cause of detention; that it has not been taken for a tax assessment, fine or execution or otherwise placed under custodia legis — or if so seized, that it is exempt; and the actual market value. Each element is a place a replevin application can fail, and the valuation element is what the bond is computed from.
Value honestly — the number cuts both ways
Understating the property's worth shrinks the bond but invites a challenge from the other side, whose protection the bond is; overstating it doubles against you, since what a surety demands scales with the bond it writes. Before filing, assemble what proves market value — purchase documents, appraisals, comparable prices — together with the papers showing ownership or the right to possession. A lawyer will want the valuation defensible on day one: it anchors the affidavit, fixes the bond, and frames the fight over the property that follows.