TSX: IMG NYSE: IAG

NEWS RELEASE

IAMGOLD MEETS PRODUCTION AND COST GUIDANCE FOR 2015 AND LOWERS COST GUIDANCE FOR 2016

All 2015 numbers are preliminary and unaudited and subject to final adjustment.

All amounts are expressed in US dollars, unless otherwise indicated.

Toronto, Ontario, January 19, 2016 - IAMGOLD Corporation ("IAMGOLD" or the "Company") announces preliminary operating results for 2015 and guidance for 2016.

IAMGOLD's President and CEO, Steve Letwin said, "Our preliminary operating results indicate a solid year overall in 2015. We met both our cost and production guidance, with production of 806,000 ounces exceeding the mid-point of our guidance range, driven by a 16% increase at Essakane. Westwood finished the year with production within its revised guidance range and a clear development and ramp-up plan going forward.

"We begin 2016 with nearly $700 million in cash and bullion and renewed confidence in mine plans that have been updated to reflect the current gold price environment. We expect production in 2016 to be consistent with 2015 as we move forward with development to open up new mining areas at Westwood. We continue to benefit from the stronger U.S. dollar and lower oil prices, and these factors, together with further opportunities to lower costs and improve productivity, have enabled us to reduce all-in sustaining cost guidance by $75 an ounce for the second year in a row to a range of $1,000 to $1,100 in 2016."

Performance Highlights for 2015

• Attributable gold production of 806,000 ounces within guidance of 780,000 to 815,000 ounces; fourth quarter production 199,000 ounces.

• Preliminary total cash costs1 expected to be below or at the lower end of guidance of $825 to $865 per ounce.

• Preliminary all-in sustaining costs1 expected to be within guidance of $1,050 to $1,150 per ounce.

• Capital expenditures of approximately $240 million, 15% lower than capital expenditures on gold assets in 2014.

• Approximately $700 million in cash, cash equivalents, restricted cash and gold bullion (market value) as at December 31, 2015.

  
  

  Guidance Highlights for 2016

• Attributable gold production expected to be between 770,000 and 800,000 ounces.

• Total cash costs expected to be between $775 and $815 per ounce.

• All-in sustaining costs expected to be between $1,000 and $1,100 per ounce.

• Capital expenditures guidance of $250 million ±10%.

1 This is a non-GAAP measure.

2015 PRELIMINARY OPERATING RESULTS

Full year attributable production of 806,000 ounces was within guidance of 780,000 to 815,000 ounces. Attributable gold production for the fourth quarter 2015 was 199,000 ounces.

The following table presents attributable production by operating site:

Total cash costs for 2015 are expected to be below or at the lower end of guidance of $825 to $865 per ounce. All-in sustaining costs are expected to be within guidance of $1,050 to $1,150 per ounce.

The Company confirms that it expects to fulfill its obligations under its bond indenture.

2016 PRODUCTION AND COST GUIDANCE

Guidance for 2016 was based on the following assumptions:

• Average gold price per ounce of $1,150;

• Average crude oil price per barrel of $63;

• U.S. dollar value of the Euro of $1.10; and

• Canadian dollar value of the U.S. dollar of $1.25.

1 This is a non-GAAP measure.

2 Consists of Rosebel, Essakane, Westwood on an attributable basis.

3 Consists of Rosebel, Essakane, Westwood, and joint ventures Sadiola and Yatela on an attributable basis.

In 2016, we expect to produce between 770,000 and 800,000 ounces of gold, compared to 806,000 ounces in 2015. With the focus at Westwood in 2016 on underground development to expand the number of mining areas and on remedial work related to last year's seismic event, Westwood's production for 2016 is expected to be between 50,000 and 60,000 ounces. Throughout 2016, the mill will operate on a reduced schedule due to the low level of mining, with a ramp-up to full capacity over the next four years. At Rosebel, higher grades and improving productivity are anticipated to lead to slightly higher production. The expected dip in production at Essakane reflects a decrease in grades, partially offset by higher throughput and recovery. The joint ventures are expected to produce 70,000 ounces. There will be some quarterly variation in production, with Rosebel and Essakane expected to be higher in the second half of the year.

Throughout 2015, the progress we made in further reducing all-in sustaining costs allowed us to lower our cost guidance heading into the final quarter of the year. Given the continued focus on cost reductions, and allowing for the impact from production variability during the year, we have set 2016 all-in sustaining cost guidance at $1,000 to $1,100 per ounce, which is $75 per ounce below our initial guidance for 2015.

2016 CAPITAL EXPENDITURE GUIDANCE ±10%

1 Includes capitalized stripping of $14 million at Rosebel and $43 million at Essakane.

2 Includes capital spending at Côté Gold and Boto Gold.

3 Capitalized borrowing costs are not included.

In 2016, we expect capital spending to be $250 million ± 10%. This represents a 5% increase from 2015, mainly due to development work at Westwood and an increase in capitalized stripping at Essakane.

Of the $150 million allocated to sustaining capital for owner-operated mines, 38% is for capitalized stripping at Essakane and Rosebel. The following summarizes the primary uses for capital spending:

Rosebel

Sustaining capital of $50 million includes capital spares ($21 million), capitalized stripping ($14 million), mill equipment ($4 million), tailings dam raise ($4 million), infrastructure development ($3 million) and other sustaining capital ($4 million). Non-sustaining capital of $15 million is mainly for a secondary crusher installation ($14 million).

Essakane

Sustaining capital of $85 million includes capitalized stripping ($43 million), capital spares ($12 million), mobile equipment ($9 million), mill equipment and maintenance ($7 million), tailings liners ($5 million), resource development ($2 million) and other sustaining capital ($7 million).

Westwood

Sustaining capital of $15 million includes capitalized development ($8 million), underground equipment ($4 million) and development drilling ($3 million). Non-sustaining capital of $65 million for expansion/ramp-up development ($60 million) and mobile and underground equipment ($5 million).

Sadiola

Non-sustaining capital of $5 million relates to the work being done to update the feasibility study on the sulphide expansion. We continue to explore options with our partner, AngloGold Ashanti, for extending the life of the mine.

Corporate and Development Projects

Non-sustaining capital of $10 million includes spending at Côté Gold and Boto Gold. At Côté Gold the focus is on de-risking the project. We will continue to advance the feasibility study, which includes conducting permitting activities and technical studies.

2016 EXPLORATION PLAN

An active exploration program is critical to replenishing reserves and resources, but given the need to further reduce costs in all aspects of our operations, we have been highly selective as to the projects we continue to advance and the new opportunities we pursue. Our exploration program is focused on the discovery of new ounces through our wholly-owned and joint venture projects in South and Central America, West Africa and Canada, as well as through targeting of soft rock resources near our existing mines. The 2016 exploration budget of $47 million is half the amount that was spent on total exploration three years ago. Compared to the initial 2015 budget of $46 million for brownfield and greenfield exploration, the planned expenditures for 2016 brownfield and greenfield exploration have been reduced by 28% to $34 million. The increase in planned expenditures for feasibility and other studies is largely due to the continuation of technical studies for the Boto Gold project and Côté Gold.

1 Excludes planned expenditures related to Sadiola and Yatela of $0.3 million for 2015 Actual and nil for 2016 Plan, and includes planned near mine and resource exploration of $9.4 million for 2015 Actual and $8 million for 2016 Plan.

2 The capitalized portion of the 2016 Plan of $18 million for 2016 is included in our capital spending guidance of $250 million ± 10%.

CONFERENCE CALL

A conference call will be held on Thursday, February 18, 2016 at 8:30 a.m. (Eastern Standard Time) for a discussion with management regarding IAMGOLD`s 2015 fourth quarter and full-year operating performance and financial results. A webcast of the conference call will be available through IAMGOLD`s website - www.iamgold.com.

Conference Call Information: North America Toll-Free: 1-800-319-4610 or International Number: 1-604-638-5340.

A replay of this conference call will be accessible for one month following the call by dialing: North America toll-free: 1-800-319-6413 or International Number: 1-604-638-9010, passcode: 00166#.

CAUTIONARY STATEMENT ON FORWARD-LOOKING INFORMATION

All information included in this news release, including any information as to the Company's future financial or operating performance, and other statements that express management's expectations or estimates of future performance, other than statements of historical fact, constitute forward looking information or forward-looking statements and are based on expectations, estimates and projections as of the date of this news release. For example, forward-looking statements contained in this news release are found under, but are not limited to being included under, the heading "2016 Production and Cost Guidance, 2016 Capital Expenditure Guidance and 2016 Exploration Plan", and include, without limitation, statements with respect to: the Company's guidance for production, total cash costs, all-in sustaining costs, depreciation expense, effective tax rate, capital expenditures, operations outlook, cost management initiatives, development and expansion projects, exploration, the future price of gold, the estimation of mineral reserves and mineral resources, the realization of mineral reserve and mineral resource estimates, the timing and amount of estimated future production, costs of production, permitting timelines, currency