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Should I choose fixed price or man-day rate — which is safer?

EEmre A***Member
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#1

two agencies sent quotes. one: '100k fixed price, 3 months delivery upon completion.' the other: '2500 lira man-day × 40 days = 100k lira but extra days can be added.'

fixed price looks safe but the agency's pace might drop. man-day is clear: if there's overrun money comes out. but which one hurts my pocket less?

if the engineers arent that experienced, the 40-day estimate might be wrong. then in the man-day model itll take 60-70 days so ill pay 150k+. if it stayed fixed theyd finish at 100k.

SSelin C***Member
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Most Helpful#2

both have pros and cons. simple rule: if you can define the scope very clearly, fixed price. if you can't, man-day.

because fixed price pushes the agency to finish fast, but if extra requests come from your side, the agency gets annoyed. man-day means every request is an extra invoice, but at least it's transparent.

this depends: can you control the team? if you can say 'let them see a demo twice a week, spot inconsistencies', man-day model is good. if it'll be uncontrolled, pick fixed price, the agency will work to 'just get it done'.

OOsman K***MemberCommunity member
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#3

fixed price: 1) guaranteed total cost. 2) agency works fast. 3) but extra requests = friction.

man-days: 1) flexible. 2) easy to add requests. 3) but the bill can shock you (40 days turns into 70).

DDilanNew member
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#4

i tried both. fixed price made me super angry cause i wanted some changes. with man-days, my money ran out and the agency cut the project short. struggled with both.

GGökhan K***Member
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#5

Fixed price is recommended for high-scope projects — because there's less conflict. For research or ambiguous projects, use man-days, but with a 'maximum budget' clause.

NNazlı Ş***New member
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Doki · Infrastructure migration · 2023

#6

From a risk management perspective: fixed price = contractor risk. Man-day = client risk. You can insure both (escrowed budget, VAT, delayed payment).

AAslı Ç***Member
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Doki · KVKK compliance consulting · 2026

#7

dont ask me what to do theyre all equally bad. i mean but if you want some safety net accept max 3 additional written requests with fixed price, thats it.

ZZafer S***Member
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#8

This thread is archived.

SSamiNew member
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Doki · Vulnerability scanning · 2023

#9

Thanks for posting.

VVeli A***MemberCommunity member
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#10

Ive been down this road, let me tell you. btw every "well look at it later" in a meeting means unbilled work.

Weekly written progress reports are much more useful than asking for dates. If you post the result here it will help others too.

EEbru K***MemberCommunity member
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#11

Let me summarize the topic, since several different answers were given. Start with a small trial; don't commit to everything at once.

AAli K***Member
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#12

I was thinking the same thing. If scope grows, either time or budget must grow. There is no third option.

If I were you, I'd go this route.

ÖÖzge E***Member
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#13

my quetions are cleared up thanks.

DDamla P***MemberCommunity member
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#14

Quick summary for newcomers: If you dont write this down from the start it leads to arguments later.

When you try to change everything at once, nothing settles.

DDamla A***MemberCommunity member
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#15

I'm curious too.

FFerhat K***Member
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#16

Correct.

HHüsniye G***MemberCommunity member
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#17

The cheap-looking path usually ends up costing more later. If it's your first time, start small; scaling comes later.

If I were you, I'd go this route.

OOrhan T***MemberCommunity member
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#18

I feel the same way. Most time waste accumulates in tasks waiting for approval.

When making a decision, first look at what data you have on hand. If I were you, I'd go this route.

LLale B***MemberCommunity member
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#19

You're right. When making decisions, write down the worst-case scenario too, not just the best.

If code ownership isn't in the contract you have no bargaining power when leaving.

FFurkan K***MemberCommunity member
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#20

Let me write how its done in practice. If you dont write this down from the start, it leads to arguments later.

If you have questions, write them; Ill answer as best I can.

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